Ajcody-MTA-Postfix-Topics: Difference between revisions

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{{BC|Zeta Alliance}}                        <!-- Note, this will also add [[Category: Zeta Alliance]] to bottom of wiki page. -->
| bgcolor="orange" | [[Image:Attention.png]] - This article is NOT official Zimbra documentation. It is a user contribution and may include unsupported customizations, references, suggestions, or information.
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<div class="col-md-12 ibox-content">
= Ajcody MTA Postfix Topics=            <!-- Normally will reflect page title. Is listed at very top of page. -->
{{KB|{{ZETA}}|{{ZCS 8.5}}|{{ZCS 8.0}}|{{ZCS 7.0}}|}}            <!-- Can only handle 3 ZCS versions. -->
{{WIP}}                                                <!-- For pages that are "work in progress". -->
 


==Postfix - MTA==
==Postfix - MTA==
Line 11: Line 15:
===Missing main.cf Error===
===Missing main.cf Error===


If you get something like:
Moved to [[Missing_main.cf_Error_-_MTA]]


postfix/postqueue[8739]: fatal: open /opt/zimbra/postfix-2.4.7.5z/conf/main.cf: No such file or directory
===MTA Mail Flow - Birds-eye Overview===


All you need to do is create an empty main.cf file and zimbra will rewrite it.
Moved to [[Postfix-Amavisd_Mail_Flow_-_Birds-eye_Overview_-_MTA]]


touch main.cf
===Understanding /var/log/zimbra.log And Postfix Log Events===


When you now do something to start the mta, it will generate the values for main.cf
Moved to: [[Understanding_zimbra.log_And_Postfix_Log_Events_-_MTA]]


zmmtactl stop
====Postfix Queue ID vs. message-id====
zmmtactl start


===MTA Mail Flow - Birds-eye Overview===
Moved to: [[Postfix_Queue_ID_vs._message-id_-_MTA]]


The following references are very good reads to familiarize yourself with in regards to postfix.
====Authentication Log Events====


* http://www.onlamp.com/pub/a/onlamp/2004/01/22/postfix.html
Moved to [[Understanding_And_Troubleshooting_Authentication_Log_Events]]
* http://www.linuxjournal.com/article/9454 [5 pages]
* https://help.ubuntu.com/community/PostfixBasicSetupHowto [nice flowcharts]
* http://www.postfix.org/OVERVIEW.html
* http://www.postfix.org/smtpd.8.html
* http://www.postfix.org/QSHAPE_README.html - "Postfix Bottleneck Analysis"
** This explains how the postfix queues work, a must read.
*** http://www.postfix.org/QSHAPE_README.html#queues
* Also look at [[Ajcody-MTA-Postfix-Topics#Getting_Some_Initial_Summary_Data]] since having this date or reports on hand might make the following above more meaningful.


Below is my initial attempt to show the flow within ZCS.
=====IMAP And Authenticated SMTP [SSL] Example=====


<pre>
Moved to [[Understanding_And_Troubleshooting_Authentication_Log_Events#IMAP_And_Authenticated_SMTP_.5BSSL.5D_Example]]
Incoming mail > smtp port 25


> netstat -plnt | grep ":25 "
======IMAP Test Via Telnet And Logging Events Of It - Proxy Included======
tcp  0  0 0.0.0.0:25      0.0.0.0:*  LISTEN      - 
## smtp port 25 is because 'mta is enabled'


> zmprov gs `zmhostname` zimbraServiceEnabled | grep mta
Moved to [[Understanding_And_Troubleshooting_Authentication_Log_Events#IMAP_Test_Via_Telnet_And_Logging_Events_Of_It_-_Proxy_Included]]
zimbraServiceEnabled: mta


Postfix's "Incoming Queue"
======IMAP Login Via Openssl - LOGIN TLS - Proxy Included======
/opt/zimbra/data/postfix/spool/incoming/


Postfix's "Active Queue"
Moved to [[Understanding_And_Troubleshooting_Authentication_Log_Events#IMAP_Login_Via_Openssl_-_LOGIN_TLS_-_Proxy_Included]]
/opt/zimbra/data/postfix/spool/active/


su - zimbra
===Network Tracing Between A Remote Host And A ZCS MTA===
$ sudo /opt/zimbra/libexec/zmqstat
hold=0
corrupt=0
deferred=0
active=0
incoming=0


Is amavisd enabled?
Moved to [[Network_Tracing_Between_A_Remote_Host_And_A_ZCS_MTA]]
zcs721:/opt/zimbra/postfix/conf # diff main.cf /tmp/before/postfix/conf/main.cf
< content_filter =
> content_filter = smtp-amavis:[127.0.0.1]:10024


Then messages goto port 10024
===Finding Messages - zmmsgtrace===
zimbra@zcs721:~> netstat -plnt | grep 10024
tcp        0      0 127.0.0.1:10024    0.0.0.0:*  LISTEN    2583/amavisd (ch8-a


Three things amavisd is enabled for:
See the following for details [for 7.1.1+]:
* zmmsgtrace replacement
** http://bugzilla.zimbra.com/show_bug.cgi?id=41078


1. spamassassin
Documentation at [[CLI_zmmsgtrace]] . Note, if you get command not found as the zimbra user, try /opt/zimbra/libexec/zmmsgtrace instead.
zmprov ms `zmhostname` +zimbraServiceEnabled antispam


/opt/zimbra/conf> diff amavisd.conf /tmp/before/amavisd.conf
===How To Increase SMTP Debug Logging - MTA===


<  @bypass_spam_checks_maps  = (1);  # uncomment to DISABLE anti-spam code
Moved to [[How_To_Increase_SMTP_Debug_Logging_-_MTA]]
> # @bypass_spam_checks_maps  = (1);  # uncomment to DISABLE anti-spam code


2. clamav
===Simple Troubleshooting For SMTP Via Telnet, Openssl===
zmprov ms `zmhostname` +zimbraServiceEnabled antivirus


/opt/zimbra/conf> diff amavisd.conf /tmp/before/amavisd.conf
Moved to [[Simple_Troubleshooting_For_SMTP_Via_Telnet_And_Openssl]]
<  @bypass_virus_checks_maps = (1);  # uncomment to DISABLE anti-virus code
> # @bypass_virus_checks_maps = (1);  # uncomment to DISABLE anti-virus code


3. archiving
====First - Understanding Your Authentication Requirements In ZCS====
zmprov ms `zmhostname` +zimbraServiceEnabled archiving


/opt/zimbra/conf> diff amavisd.conf /tmp/before/amavisd.conf
Moved to [[Simple_Troubleshooting_For_SMTP_Via_Telnet_And_Openssl#First_-_Understanding_Your_Authentication_Requirements_In_ZCS]]
< $archive_quarantine_method = 'smtp:[127.0.0.1]:10025';
> #$archive_quarantine_method = 'smtp:[127.0.0.1]:10025';


zimbra@zcs721:~/postfix/conf> netstat -plnt | grep 1002
====Second - Encoding Username And Passwords For AUTH Sequence====
tcp        0      0 127.0.0.1:10024    0.0.0.0:*    LISTEN      13779/amavisd (mast
tcp        0      0 127.0.0.1:10025    0.0.0.0:*    LISTEN     


Once the amavis related items are checked, the message goes back to postfix's
Moved to [[Simple_Troubleshooting_For_SMTP_Via_Telnet_And_Openssl#Second_-_Encoding_Username_And_Passwords_For_AUTH_Sequence]]
active queue via port 10025 and will get delivered to the mailstore via lmtp/port 7025


> netstat -plnt | grep 7025
====For ESMTP Auth is LOGIN - Example====
tcp        0      0 0.0.0.0:7025            0.0.0.0:*              LISTEN      - 


You can see how the ports are configured in /opt/zimbra/postfix/conf in the master.cf & master.cf.in
Moved to [[Simple_Troubleshooting_For_SMTP_Via_Telnet_And_Openssl#For_ESMTP_Auth_is_LOGIN_-_Example]]
files. Port 10025 [always configured] and 10024 [only configured if amavis is enabled]  
are setup there also.


</pre>
====For ESMTP Auth is Plain - Example====


===Understanding /var/log/zimbra.log And Postfix Log Events===
Moved to [[Simple_Troubleshooting_For_SMTP_Via_Telnet_And_Openssl#For_ESMTP_Auth_is_Plain_-_Example]]


Ref:
====For TLS/SSL - Example====
* http://www.onlamp.com/pub/a/onlamp/2004/01/22/postfix.html
* https://wiki.kolab.org/What_is_happening_to_my_emails_where_are_their._Search_your_postfix_log_to_find_them


To see some of the basic warning:
Moved to [[Simple_Troubleshooting_For_SMTP_Via_Telnet_And_Openssl#For_TLS.2FSSL_-_Example]]


$ egrep '(reject|warning|error|fatal|panic):' /var/log/zimbra.log
=====Testing Against Port 465=====


Log events follow this basic pattern:
Moved to [[Simple_Troubleshooting_For_SMTP_Via_Telnet_And_Openssl#Testing_Against_Port_465]]
<pre>
Description
    || Date & Time  || Hostname || Postfix component id || Message
Example   
      Dec 31 11:34:21  testserver    postfix/smtpd[1677]:  connect from mail.example.com[192.168.100.45]
</pre>
The process ID is in the square brackets.


====Postfix Queue ID vs. message-id====
====To Confirm An Auth User Can't Send With Another FROM Address====


* '''Note, postfix queue ID is NOT message-id.'''
Moved to [[Simple_Troubleshooting_For_SMTP_Via_Telnet_And_Openssl#To_Confirm_An_Auth_User_Can.27t_Send_With_Another_FROM_Address]]
* '''''For the examples below, the ZCS server being used has an ip address of 10.137.27.32 .'''''


A message-id is assigned by the MUA or postfix if the message doesn't have one. The message-id is in the header of the email. The postfix queue ID is NOT in the header of the emails. An email header will also have the original emails message-id if it's an reply.
===Adding A New MTA Server===


<pre>
Basic instructions can be found here:
Date: Tue, 4 Jun 2013 06:43:55 -0700 (PDT)
* http://www.zimbra.com/docs/ne/latest/multi_server_install/toc.html
From: Adam Cody 2 <ajcody2@zcs723.EXAMPLE.com>
** See "Installing Zimbra MTA on a Server"
To: Adam Cody <ajcody@zcs723.EXAMPLE.com>
###  COMMENT START - Below are the two message-id's
###  The message-id is noted the /var/log/zimbra.log log events
###  Example will be shown farther down
Message-ID: <315186059.60.1370353435012.JavaMail.root@zcs723.EXAMPLE.com>
In-Reply-To: <692082388.59.1370352733069.JavaMail.root@zcs723.EXAMPLE.com>
###  End Of COMMENT
Subject: Re: test email
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
X-Originating-IP: [10.16.XX.XX]
X-Mailer: Zimbra 7.2.3_GA_2872 (ZimbraWebClient - [unknown] (Win)/0.0)


reply back
Additional instructions needed beyond the above will follow as I hear about them.


----- Original Message -----
===Load Balancing For SMTP - Out Bound Mail===
From: "Adam Cody" <ajcody@zcs723.EXAMPLE.com>
To: "Adam Cody 2" <ajcody2@zcs723.EXAMPLE.com>
Sent: Tuesday, June 4, 2013 9:32:13 AM
Subject: test email
</pre>


When a message enters the Postfix system [incoming or outgoing] it is immediately assigned a queue ID. Postfix/ZCS will most likely have a message leave the postfix queue for other processing: amavis, filters, etc. This will cause the message to get a new queue ID's. This can also happen if you were to requeue your messages by doing something like: postsuper -r . You will need to note the '''message-id and ALL queue ID's''' to get the complete picture of what was happening for a particular email. For the example below, I first did a search for the message-id [found by looking at the header, ZWC > Sent box > View Original on email I sent] in /var/log/zimbra.log.
Currently, '''5.x code''', you have the following options:


egrep "692082388.59.1370352733069.JavaMail.root" /var/log/zimbra.log
* Configure zimbraMtaRelayHost and zimbraSmtpHostname [[Ajcody-Server-Topics#Using_Different_SMTP_Server_For_Webclient_.28ZWC.29.2C_Mobiles.2C_And_ZCO|zimbraSmtpHostname Details]] to:


This output then gave me the associated postfix queue ID's, there were two unique ones. I then did another search using all three variables:
** An external load balancing device that will then split the traffic behind it
** Setup a round-robin A record situation in your DNS for the external mta's you'll be using.


<pre>
In, '''GNR/6.x''', you are able to add multiple targets to the variables and we'll have some degree of "balancing" between them.
        QueueID      QueueID          MessageID
egrep "59E261E78D1|C6CAA1E78D2|692082388.59.1370352733069.JavaMail.root" /var/log/zimbra.log
</pre>


Below is the return to find the full log event in /var/log/zimbra.log for this one email.
* "allow list for zimbraSmtpHostname"
** http://bugzilla.zimbra.com/show_bug.cgi?id=10695
* "make zimbraSmtpHostname fault tolerant"
** http://bugzilla.zimbra.com/show_bug.cgi?id=36173


<pre>
===User Alias Mapping And Mail Transport with Postfix & LDAP===
Jun  4 06:32:14 zcs723 postfix/smtpd[16290]:
  59E261E78D1: client=zcs723.EXAMPLE.com[10.137.27.32]
Jun  4 06:32:14 zcs723 postfix/cleanup[16293]:
  59E261E78D1: message-id=<692082388.59.1370352733069.JavaMail.root@zcs723.EXAMPLE.com>
Jun  4 06:32:14 zcs723 postfix/qmgr[7864]:
  59E261E78D1: from=<ajcody@zcs723.EXAMPLE.com>, size=673, nrcpt=1 (queue active)
Jun  4 06:32:44 zcs723 postfix/smtpd[16310]:
  C6CAA1E78D2: client=localhost[127.0.0.1]
Jun  4 06:32:44 zcs723 postfix/cleanup[16293]:
  C6CAA1E78D2: message-id=<692082388.59.1370352733069.JavaMail.root@zcs723.EXAMPLE.com>
Jun  4 06:32:44 zcs723 postfix/qmgr[7864]:
  C6CAA1E78D2: from=<ajcody@zcs723.EXAMPLE.com>, size=1361, nrcpt=1 (queue active)
Jun  4 06:32:44 zcs723 amavis[19662]: (19662-02)
  FWD via SMTP: <ajcody@zcs723.EXAMPLE.com> -> <ajcody2@zcs723.EXAMPLE.com>,
  BODY=7BIT 250 2.0.0 from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as C6CAA1E78D2
Jun  4 06:32:45 zcs723 postfix/lmtp[16311]: C6CAA1E78D2: to=<ajcody2@zcs723.EXAMPLE.com>,
  relay=zcs723.EXAMPLE.com[10.137.27.32]:7025, delay=0.85, delays=0.11/0.01/0.39/0.34,
  dsn=2.1.5, status=sent (250 2.1.5 Delivery OK)
Jun  4 06:32:45 zcs723 postfix/qmgr[7864]: C6CAA1E78D2: removed
Jun  4 06:32:46 zcs723 amavis[19662]: (19662-02)
  Passed CLEAN, MYNETS LOCAL [10.137.27.32] [10.137.27.32]
  <ajcody@zcs723.EXAMPLE.com> -> <ajcody2@zcs723.EXAMPLE.com>,
  Message-ID: <692082388.59.1370352733069.JavaMail.root@zcs723.EXAMPLE.com>,
  mail_id: GGpaucYR0-4J, Hits: -1.106, size: 673, queued_as: C6CAA1E78D2, 28828 ms
Jun  4 06:32:46 zcs723 postfix/smtp[16294]: 59E261E78D1: to=<ajcody2@zcs723.EXAMPLE.com>,
  relay=127.0.0.1[127.0.0.1]:10024, delay=32, delays=0.16/0.09/5.3/26, dsn=2.0.0,
  status=sent (250 2.0.0 from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as C6CAA1E78D2)
Jun  4 06:32:46 zcs723 postfix/qmgr[7864]: 59E261E78D1: removed
</pre>


And the reply to the above message is shown below. [Note, both accounts are on the same ZCS system]:
See [[User_Alias_Mapping_and_Mail_Transport_with_Postfix_%26_LDAP]]


<pre>
====Multiple LDAP Servers?====
Jun  4 06:43:56 zcs723 postfix/cleanup[20443]:
  EFD1D1E78D1: message-id=<315186059.60.1370353435012.JavaMail.root@zcs723.us.zimbralab.com>
Jun  4 06:44:28 zcs723 postfix/cleanup[20443]:
  C0E171E78D2: message-id=<315186059.60.1370353435012.JavaMail.root@zcs723.us.zimbralab.com>
Jun  4 06:44:29 zcs723 amavis[19663]: (19663-02)
  Passed CLEAN, MYNETS LOCAL [10.137.27.32] [10.137.27.32]
  <ajcody2@zcs723.us.zimbralab.com> -> <ajcody@zcs723.us.zimbralab.com>,
  Message-ID: <315186059.60.1370353435012.JavaMail.root@zcs723.us.zimbralab.com>,
  mail_id: 0XbLSIeuewz3, Hits: -1.106, size: 969, queued_as: C0E171E78D2, 31775 ms
</pre>


When using any of the postfix commands to view/manipulate messages, they will be using the queueID that the message currently has. For example, mailq output looks like this:
Completed RFE:


<pre>
* "mta should be able to take a list of LDAP servers to take advantage of replicas."
[root@zcs723 ~]# /opt/zimbra/postfix/sbin/mailq
** http://bugzilla.zimbra.com/show_bug.cgi?id=9353
-Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient-------
*** zmmtainit to allow for multiple command line options that will set the URL. Grab the contents of the ldap_url localconfig variable.
C12E6246BC      514 Tue Mar 26 08:00:35  root
                                        zimbra


C7F00246A8      517 Tue Mar 26 07:00:24  root
From :
                                        zimbra


9A2D124693      530 Mon Apr 15 19:04:20  root
* http://www.postfix.org/ldap_table.5.html
                                        zimbra
</pre>


To view a message that is still in the postfix queues/spool, you can use the postcat command with the -q option [-q (access queue)].
<pre>
        server_host (default: localhost)
              The name of the host running the LDAP server, e.g.


postcat -q C12E6246BC | more
                  server_host = ldap.example.com


====Authentication Log Events====
              Depending  on the LDAP client library you're using,
              it should be possible to specify  multiple  servers
              here,  with the library trying them in order should
              the first one fail. It should also be  possible  to
              give  each  server  in  the  list  a different port
              (overriding server_port below), by naming them like


=====IMAP And Authenticated SMTP [SSL] Example=====
                  server_host = ldap.example.com:1444


* '''''For the examples below, the ZCS server being used has an ip address of 10.137.27.32 .'''''
              With OpenLDAP, a (list of) LDAP URLs can be used to
* '''Note, I included the client IP address [10.16.245.217] of the IMAP client and also the -C2 flag for egrep to show 2 lines proceeding and after the match for ip and username. I also trimmed the output using the time I did the initial IMAP setup and used the -F option for grep because of the : character. [ | grep -F 'Jun  4 08:4' ] '''
              specify both the hostname(s) and the port(s):


Using the test account above, ajcody@ , I configured it to use IMAP [Use SSL option] and authenticated SMTP [SSL and "password" option] with Apple's Mail.App. My initially login creates these authentication events below.
                  server_host = ldap://ldap.example.com:1444
                              ldap://ldap2.example.com:1444


First, to give you a general impression what logs will hold information on a username and the ip address the client is connection from. The -l option for grep/egrep will just list the files names that have a math to the search.
              All LDAP URLs accepted by the OpenLDAP library  are
              supported,  including  connections over UNIX domain
              sockets, and LDAP SSL (the last one  provided  that
              OpenLDAP was compiled with support for SSL):


<pre>
                  server_host = ldapi://%2Fsome%2Fpath
[root@zcs723 log]# egrep -l 'ajcody|10.16.245.217' /opt/zimbra/log/*
                              ldaps://ldap.example.com:636
/opt/zimbra/log/2013_05_31.trace.log  << Because of my ZWC login session
/opt/zimbra/log/2013_06_04.trace.log  << Because of my ZWC login session
/opt/zimbra/log/access_log.2013-05-31 << Because of my ZWC login session
/opt/zimbra/log/access_log.2013-06-04 << Because of my ZWC login session
/opt/zimbra/log/audit.log
/opt/zimbra/log/mailbox.log


[root@zcs723 log]# egrep -l 'ajcody|10.16.245.217' /var/log/*
**my note**
## Removed not related matches because I've sshd into the server
This thread - http://archives.neohapsis.com/archives/postfix/2004-09/1763.html
/var/log/maillog
give me the impression they made a mistake in modifying the help file on this
/var/log/maillog-20130602
and they dropped the use/need of the command:
/var/log/messages
/var/log/messages-20130602
/var/log/zimbra.log
</pre>


Now to see what the events are. In the /opt/zimbra/log/audit.log file we have:
  server_host = ldap://ldap.example.com:1444, ldap://ldap2.example.com:1444
 
<pre>
# grep egrep -C2 'ajcody|10.16.245.217' /opt/zimbra/log/audit.log | grep -F 'Jun  4 08:4'
    [cut out prior events]
2013-06-04 08:43:01,943 INFO  [ImapServer-1] [ip=10.16.245.217;ua=Mac OS X Mail/6.2 (1499);]
  security - cmd=Auth; account=ajcody@zcs723.EXAMPLE.com; protocol=imap;
2013-06-04 08:43:04,031 INFO  [ImapServer-2] [ip=10.16.245.217;ua=Mac OS X Mail/6.2 (1499);]
  security - cmd=Auth; account=ajcody@zcs723.EXAMPLE.com; protocol=imap;
2013-06-04 08:43:07,078 INFO  [ImapServer-3] [ip=10.16.245.217;ua=Mac OS X Mail/6.2 (1499);]
  security - cmd=Auth; account=ajcody@zcs723.EXAMPLE.com; protocol=imap;
2013-06-04 08:43:09,437 INFO  [ImapServer-4] [ip=10.16.245.217;ua=Mac OS X Mail/6.2 (1499);]
  security - cmd=Auth; account=ajcody@zcs723.EXAMPLE.com; protocol=imap;
2013-06-04 08:43:11,645 INFO  [ImapServer-5] [ip=10.16.245.217;ua=Mac OS X Mail/6.2 (1499);]
  security - cmd=Auth; account=ajcody@zcs723.EXAMPLE.com; protocol=imap;
</pre>
</pre>


And in the /var/log/zimbra.log :
Just a small note on where var shows up:


<pre>
<pre>
[root@zcs723 log]# egrep -C2 'ajcody|10.16.245.217' zimbra.log | grep -F 'Jun  4 08:4'
[root@mail3 conf]# pwd
    [cut out prior events]
/opt/zimbra/conf
Jun  4 08:42:07 zcs723 zmmailboxdmgr[1389]: status requested
[root@mail3 conf]# grep server_host *
Jun 4 08:42:07 zcs723 zmmailboxdmgr[1389]: status OK
amavisd.conf.in:$myhostname = '@@zimbra_server_hostname@@'; # must be a fully-qualified domain name!
Jun  4 08:42:27 zcs723 postfix/smtpd[1487]: connect from unknown[10.16.245.217]
ldap-scm.cf:server_host = ldap://mail3.zimbra.DOMAIN.com:389
Jun  4 08:42:28 zcs723 postfix/smtpd[1487]: setting up TLS connection from unknown[10.16.245.217]
ldap-transport.cf:server_host = ldap://mail3.zimbra.DOMAIN.com:389
Jun  4 08:42:30 zcs723 postfix/smtpd[1487]: SSL_accept error from unknown[10.16.245.217]: -1
ldap-vad.cf:server_host = ldap://mail3.zimbra.DOMAIN.com:389
Jun  4 08:42:30 zcs723 postfix/smtpd[1487]: lost connection after STARTTLS from unknown[10.16.245.217]
ldap-vam.cf:server_host = ldap://mail3.zimbra.DOMAIN.com:389
Jun  4 08:42:30 zcs723 postfix/smtpd[1487]: disconnect from unknown[10.16.245.217]
ldap-vmd.cf:server_host = ldap://mail3.zimbra.DOMAIN.com:389
Jun  4 08:42:30 zcs723 postfix/smtpd[1487]: connect from unknown[10.16.245.217]
ldap-vmm.cf:server_host = ldap://mail3.zimbra.DOMAIN.com:389
Jun  4 08:42:31 zcs723 postfix/smtpd[1487]: setting up TLS connection from unknown[10.16.245.217]
localconfig.xml<key name="zimbra_server_hostname">
Jun  4 08:42:31 zcs723 postfix/smtpd[1487]: Anonymous TLS connection established from unknown[10.16.245.217]:  
zmmta.cf: LOCAL zimbra_server_hostname
  TLSv1 with cipher AES128-SHA (128/128 bits)
zmmta.cf: POSTCONF myhostname LOCAL zimbra_server_hostname
Jun  4 08:42:32 zcs723 postfix/smtpd[1497]: connect from unknown[10.16.245.217]
Jun  4 08:42:32 zcs723 postfix/smtpd[1497]: setting up TLS connection from unknown[10.16.245.217]
Jun  4 08:42:32 zcs723 postfix/smtpd[1497]: Anonymous TLS connection established from unknown[10.16.245.217]:  
  TLSv1 with cipher AES128-SHA (128/128 bits)
--
Jun  4 08:42:33 zcs723 saslauthd[8077]: auth_zimbra: ajcody auth OK
Jun  4 08:42:34 zcs723 postfix/smtpd[1497]: disconnect from unknown[10.16.245.217]
Jun  4 08:42:34 zcs723 postfix/smtpd[1487]: lost connection after EHLO from unknown[10.16.245.217]
Jun  4 08:42:34 zcs723 postfix/smtpd[1487]: disconnect from unknown[10.16.245.217]
Jun  4 08:43:01 zcs723 zmmailboxdmgr[1583]: status requested
Jun  4 08:43:01 zcs723 zmmailboxdmgr[1583]: status OK
--
Jun  4 08:45:08 zcs723 zmmailboxdmgr[2353]: status requested
Jun  4 08:45:08 zcs723 zmmailboxdmgr[2353]: status OK
Jun  4 08:45:54 zcs723 postfix/anvil[1489]: statistics: max connection rate 3/60s for
  (smtp:10.16.245.217) at Jun  4 08:42:32
Jun 4 08:45:54 zcs723 postfix/anvil[1489]: statistics: max connection count 2 for
  (smtp:10.16.245.217) at Jun  4 08:42:32
Jun  4 08:45:54 zcs723 postfix/anvil[1489]: statistics: max cache size 1 at Jun  4 08:42:27
Jun  4 08:46:07 zcs723 zmmailboxdmgr[2706]: status requested
</pre>
</pre>


In the /opt/zimbra/log/mailbox.log :
References:


<pre>
* http://archives.neohapsis.com/archives/postfix/2000-04/0200.html
[root@zcs723 log]# egrep -C2 'ajcody|10.16.245.217' mailbox.log | grep -F 'Jun  4 08:4'


2013-06-04 08:43:00,343 INFO  [ImapServer-1] [] imap - [10.16.245.217] connected
===Traditional Aliases Use - /etc/aliases Type Lookups===
2013-06-04 08:43:01,999 INFO  [ImapServer-1] [name=ajcody@zcs723.EXAMPLE.com;ip=10.16.245.217;
  ua=Mac OS X Mail/6.2 (1499);] imap - user ajcody@zcs723.EXAMPLE.com authenticated, mechanism=PLAIN [TLS]
2013-06-04 08:43:02,640 INFO  [ImapServer-2] [] imap - [10.16.245.217] connected
2013-06-04 08:43:04,031 INFO  [ImapServer-2] [name=ajcody@zcs723.EXAMPLE.com;
  ip=10.16.245.217;ua=Mac OS X Mail/6.2 (1499);]
  imap - user ajcody@zcs723.EXAMPLE.com authenticated, mechanism=PLAIN [TLS]
2013-06-04 08:43:04,721 WARN  [ImapServer-2] [name=ajcody@zcs723.EXAMPLE.com;
  ip=10.16.245.217;ua=Mac OS X Mail/6.2 (1499);]
  ConfigurationFactory - No configuration found. Configuring ehcache from ehcache-failsafe.xml 
  found in the classpath:
  jar:file:/opt/zimbra/jetty-6.1.22.z6/webapps/service/WEB-INF/lib/ehcache-core-2.5.1.jar!/ehcache-failsafe.xml
2013-06-04 08:43:05,010 WARN  [ImapServer-2] [name=ajcody@zcs723.EXAMPLE.com;
  ip=10.16.245.217;ua=Mac OS X Mail/6.2 (1499);]
  ConfigurationFactory - No configuration found. Configuring ehcache from ehcache-failsafe.xml 
  found in the classpath:
  jar:file:/opt/zimbra/jetty-6.1.22.z6/webapps/service/WEB-INF/lib/ehcache-core-2.5.1.jar!/ehcache-failsafe.xml
2013-06-04 08:43:05,420 INFO  [ImapServer-2] [name=ajcody@zcs723.EXAMPLE.com;
  ip=10.16.245.217;ua=Mac OS X Mail/6.2 (1499);]
  imap - selected folder INBOX
2013-06-04 08:43:05,922 INFO  [ImapServer-3] [] imap - [10.16.245.217] connected
2013-06-04 08:43:07,390 INFO  [ImapServer-3] [name=ajcody@zcs723.EXAMPLE.com;
  ip=10.16.245.217;ua=Mac OS X Mail/6.2 (1499);]
  imap - user ajcody@zcs723.EXAMPLE.com authenticated, mechanism=PLAIN [TLS]
2013-06-04 08:43:08,220 INFO  [ImapServer-4] [] imap - [10.16.245.217] connected
2013-06-04 08:43:09,437 INFO  [ImapServer-4] [name=ajcody@zcs723.EXAMPLE.com;
  ip=10.16.245.217;ua=Mac OS X Mail/6.2 (1499);]
  imap - user ajcody@zcs723.EXAMPLE.com authenticated, mechanism=PLAIN [TLS]
2013-06-04 08:43:10,395 INFO  [ImapServer-1] [] imap - dropping connection for user
  ajcody@zcs723.EXAMPLE.com (server-initiated)
2013-06-04 08:43:10,395 INFO  [ImapServer-1] [] ProtocolHandler - Handler exiting normally
2013-06-04 08:43:10,447 INFO  [ImapServer-5] [] imap - [10.16.245.217] connected
2013-06-04 08:43:11,645 INFO  [ImapServer-5] [name=ajcody@zcs723.EXAMPLE.com;
  ip=10.16.245.217;ua=Mac OS X Mail/6.2 (1499);]
  imap - user ajcody@zcs723.EXAMPLE.com authenticated, mechanism=PLAIN [TLS]
2013-06-04 08:43:12,521 INFO  [ImapServer-3] [name=ajcody@zcs723.EXAMPLE.com;
  ip=10.16.245.217;ua=Mac OS X Mail/6.2 (1499);] imap - selected folder Contacts
2013-06-04 08:43:12,685 INFO  [ImapServer-4] [name=ajcody@zcs723.EXAMPLE.com;
  ip=10.16.245.217;ua=Mac OS X Mail/6.2 (1499);] imap - selected folder Emailed Contacts
2013-06-04 08:43:13,813 INFO  [ImapServer-3] [name=ajcody@zcs723.EXAMPLE.com;
  ip=10.16.245.217;ua=Mac OS X Mail/6.2 (1499);] imap - selected folder Junk
2013-06-04 08:43:13,971 INFO  [ImapServer-5] [name=ajcody@zcs723.EXAMPLE.com;
  ip=10.16.245.217;ua=Mac OS X Mail/6.2 (1499);] imap - selected folder Sent
2013-06-04 08:43:15,614 INFO  [ImapServer-3] [name=ajcody@zcs723.EXAMPLE.com;
  ip=10.16.245.217;ua=Mac OS X Mail/6.2 (1499);] imap - selected folder Trash
2013-06-04 08:43:16,694 INFO  [ImapServer-4] [name=ajcody@zcs723.EXAMPLE.com;mid=15;
  ip=10.16.245.217;ua=Mac OS X Mail/6.2 (1499);] imap - selected folder Chats
2013-06-04 08:43:17,211 INFO  [ImapServer-3] [name=ajcody@zcs723.EXAMPLE.com;
  ip=10.16.245.217;ua=Mac OS X Mail/6.2 (1499);] imap - selected folder Emailed Contacts
2013-06-04 08:43:17,344 INFO  [ImapServer-2] [name=ajcody@zcs723.EXAMPLE.com;mid=15;
  ip=10.16.245.217;ua=Mac OS X Mail/6.2 (1499);] imap - selected folder Drafts
2013-06-04 08:43:17,358 INFO  [ImapServer-3] [name=ajcody@zcs723.EXAMPLE.com;mid=15;
  ip=10.16.245.217;ua=Mac OS X Mail/6.2 (1499);] imap - selected folder INBOX
2013-06-04 08:43:17,840 INFO  [ImapServer-4] [name=ajcody@zcs723.EXAMPLE.com;
  ip=10.16.245.217;ua=Mac OS X Mail/6.2 (1499);] imap - selected folder Emailed Contacts
2013-06-04 08:44:00,813 INFO  [MailboxPurge] [name=ajcody@zcs723.EXAMPLE.com;mid=15;]
  purge - Purging messages.
2013-06-04 08:44:41,428 INFO  [btpool0-28://zcs723.EXAMPLE.com/service/soap/NoOpRequest]
  [name=ajcody2@zcs723.EXAMPLE.com;mid=16;ip=10.16.245.217;ua=ZimbraWebClient - [unknown] (Win)/0.0;]
  soap - NoOpRequest elapsed=0
2013-06-04 08:45:00,818 INFO  [MailboxPurge] [name=ajcody2@zcs723.EXAMPLE.com;mid=16;]
  purge - Purging messages.
</pre>


The /var/log/messages and /var/log/maillog had the same events:
Moved to [[Traditional_Aliases_Use_-_/etc/aliases_Type_Lookups]]


<pre>
===Allowing Accounts To Change The From Address===
[root@zcs723 log]# egrep -C2 'ajcody|10.16.245.217' /var/log/messages | grep -F 'Jun  4 08:42'
Jun  4 08:42:07 zcs723 zmmailboxdmgr[1389]: status requested
Jun  4 08:42:07 zcs723 zmmailboxdmgr[1389]: status OK
Jun  4 08:42:27 zcs723 postfix/smtpd[1487]: connect from unknown[10.16.245.217]
Jun  4 08:42:28 zcs723 postfix/smtpd[1487]: setting up TLS connection from unknown[10.16.245.217]
Jun  4 08:42:30 zcs723 postfix/smtpd[1487]: SSL_accept error from unknown[10.16.245.217]: -1
Jun  4 08:42:30 zcs723 postfix/smtpd[1487]: lost connection after STARTTLS from unknown[10.16.245.217]
Jun  4 08:42:30 zcs723 postfix/smtpd[1487]: disconnect from unknown[10.16.245.217]
Jun  4 08:42:30 zcs723 postfix/smtpd[1487]: connect from unknown[10.16.245.217]
Jun  4 08:42:31 zcs723 postfix/smtpd[1487]: setting up TLS connection from unknown[10.16.245.217]
Jun  4 08:42:31 zcs723 postfix/smtpd[1487]: Anonymous TLS connection established
  from unknown[10.16.245.217]: TLSv1 with cipher AES128-SHA (128/128 bits)
Jun  4 08:42:32 zcs723 postfix/smtpd[1497]: connect from unknown[10.16.245.217]
Jun  4 08:42:32 zcs723 postfix/smtpd[1497]: setting up TLS connection from unknown[10.16.245.217]
Jun  4 08:42:32 zcs723 postfix/smtpd[1497]: Anonymous TLS connection established
  from unknown[10.16.245.217]: TLSv1 with cipher AES128-SHA (128/128 bits)
Jun  4 08:42:34 zcs723 postfix/smtpd[1497]: disconnect from unknown[10.16.245.217]
Jun  4 08:42:34 zcs723 postfix/smtpd[1487]: lost connection after EHLO from unknown[10.16.245.217]
Jun  4 08:42:34 zcs723 postfix/smtpd[1487]: disconnect from unknown[10.16.245.217]
Jun  4 08:45:54 zcs723 postfix/anvil[1489]: statistics: max connection rate 3/60s
  for (smtp:10.16.245.217) at Jun  4 08:42:32
Jun  4 08:45:54 zcs723 postfix/anvil[1489]: statistics: max connection count 2
  for (smtp:10.16.245.217) at Jun  4 08:42:32
Jun  4 08:45:54 zcs723 postfix/anvil[1489]: statistics: max cache size 1 at Jun  4 08:42:27


[root@zcs723 log]# egrep -C2 'ajcody|10.16.245.217' /var/log/maillog | grep -F 'Jun  4 08:42'
Please see:
Jun  4 08:42:07 zcs723 zmmailboxdmgr[1389]: status requested
Jun  4 08:42:07 zcs723 zmmailboxdmgr[1389]: status OK
Jun  4 08:42:27 zcs723 postfix/smtpd[1487]: connect from unknown[10.16.245.217]
Jun  4 08:42:28 zcs723 postfix/smtpd[1487]: setting up TLS connection from unknown[10.16.245.217]
Jun  4 08:42:30 zcs723 postfix/smtpd[1487]: SSL_accept error from unknown[10.16.245.217]: -1
Jun  4 08:42:30 zcs723 postfix/smtpd[1487]: lost connection after STARTTLS from unknown[10.16.245.217]
Jun  4 08:42:30 zcs723 postfix/smtpd[1487]: disconnect from unknown[10.16.245.217]
Jun  4 08:42:30 zcs723 postfix/smtpd[1487]: connect from unknown[10.16.245.217]
Jun  4 08:42:31 zcs723 postfix/smtpd[1487]: setting up TLS connection from unknown[10.16.245.217]
Jun  4 08:42:31 zcs723 postfix/smtpd[1487]: Anonymous TLS connection established
  from unknown[10.16.245.217]: TLSv1 with cipher AES128-SHA (128/128 bits)
Jun  4 08:42:32 zcs723 postfix/smtpd[1497]: connect from unknown[10.16.245.217]
Jun  4 08:42:32 zcs723 postfix/smtpd[1497]: setting up TLS connection from unknown[10.16.245.217]
Jun  4 08:42:32 zcs723 postfix/smtpd[1497]: Anonymous TLS connection established
  from unknown[10.16.245.217]: TLSv1 with cipher AES128-SHA (128/128 bits)
Jun  4 08:42:34 zcs723 postfix/smtpd[1497]: disconnect from unknown[10.16.245.217]
Jun  4 08:42:34 zcs723 postfix/smtpd[1487]: lost connection after EHLO from unknown[10.16.245.217]
Jun  4 08:42:34 zcs723 postfix/smtpd[1487]: disconnect from unknown[10.16.245.217]
Jun  4 08:45:54 zcs723 postfix/anvil[1489]: statistics: max connection rate 3/60s
  for (smtp:10.16.245.217) at Jun  4 08:42:32
Jun  4 08:45:54 zcs723 postfix/anvil[1489]: statistics: max connection count 2
  for (smtp:10.16.245.217) at Jun  4 08:42:32
Jun  4 08:45:54 zcs723 postfix/anvil[1489]: statistics: max cache size 1 at Jun  4 08:42:27
</pre>


======IMAP Test Via Telnet And Logging Events Of It - Proxy Included======
* [http://www.zimbra.com/forums/installation/18171-solved-setting-up-email-response-aliases-non-system-domains.html#post92121 Changing The From Field]


<pre>
====Related BUG/RFE's====


### TELNET FROM CLIENT ###
* Identities: Auto verify user settable from address [marked as dup of 29974]
# telnet zcs806.DOMAIN.com 143
** http://bugzilla.zimbra.com/show_bug.cgi?id=12094
Trying 192.168.27.36...
* persona/external account from field address verification
Connected to zcs806.DOMAIN.com.
** http://bugzilla.zimbra.com/show_bug.cgi?id=29974
Escape character is '^]'.
* ZCO Support for zimbraAllowAnyFromAddress
* OK IMAP4 ready
** http://bugzilla.zimbra.com/show_bug.cgi?id=31278
01 LOGIN proxylogtest@zcs806.DOMAIN.com [REPLACE WITH ACCT PASSWORD]
01 OK [CAPABILITY IMAP4rev1 ACL BINARY CATENATE CHILDREN CONDSTORE ENABLE ESEARCH ESORT
I18NLEVEL=1 ID IDLE LIST-EXTENDED LIST-STATUS LITERAL+ LOGIN-REFERRALS MULTIAPPEND
NAMESPACE QRESYNC QUOTA RIGHTS=ektx SASL-IR SEARCHRES SORT THREAD=ORDEREDSUBJECT
UIDPLUS UNSELECT WITHIN XLIST] LOGIN completed
01 logout


### LOGS ON ZCS SERVER ###
===Creating A Domain Alias===


[zimbra@zcs806 log]$ egrep "192\.168\.27\.37|proxylogtest" *
Please see [[ManagingDomains#Creating_a_Domain_Alias]]


nginx.log:2014/02/28 09:32:16 [info] 25611#0: *2595 client 192.168.27.37 connected to 0.0.0.0:143
===Relay Domain Forwarding===
nginx.log:2014/02/28 09:32:38 [info] 25611#0: *2595 client logged in, client: 192.168.27.37,
      server: 0.0.0.0:143, login: "proxylogtest@zcs806.DOMAIN.com", upstream: 192.168.27.36:7993
      (192.168.27.37:45080-192.168.27.36:143) <=> (192.168.27.36:53326-192.168.27.36:7993)


audit.log:2014-02-28 09:32:35,532 INFO  [ImapSSLServer-13] [ip=192.168.27.36;oip=192.168.27.37;
Please see [[ManagingDomains#Relaying.2FDomain_Forwarding]]
      via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;] security - cmd=Auth;
      account=proxylogtest@zcs806.DOMAIN.com; protocol=imap;


mailbox.log:2014-02-28 09:32:35,527 INFO  [ImapSSLServer-13] [ip=192.168.27.36;oip=192.168.27.37; 
===Domain Catchall===
      via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;] imap - ID elapsed=8
mailbox.log:2014-02-28 09:32:35,743 INFO  [ImapSSLServer-13] [ip=192.168.27.36;oip=192.168.27.37;
      via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;] mailbox - Creating database
      mboxgroup50
mailbox.log:2014-02-28 09:32:37,986 INFO  [ImapSSLServer-13] [ip=192.168.27.36;oip=192.168.27.37;
      via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;] mailbox -
      Creating mailbox with id 50 and group id 50 for proxylogtest@zcs806.DOMAIN.com.
mailbox.log:2014-02-28 09:32:37,986 INFO  [ImapSSLServer-13] [ip=192.168.27.36;oip=192.168.27.37;
      via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;] cache - initializing folder
      and tag caches for mailbox 50
mailbox.log:2014-02-28 09:32:37,987 INFO  [ImapSSLServer-13] [ip=192.168.27.36;oip=192.168.27.37;
      via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;] mailop - adding folder ROOT:
      id=11, parentId=11.
mailbox.log:2014-02-28 09:32:38,010 INFO  [ImapSSLServer-13] [ip=192.168.27.36;oip=192.168.27.37;
      via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;] mailop - adding folder Tags:
      id=8, parentId=11.
mailbox.log:2014-02-28 09:32:38,011 INFO  [ImapSSLServer-13] [ip=192.168.27.36;oip=192.168.27.37;
      via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;] mailop - adding folder
      Conversations: id=9, parentId=11.
mailbox.log:2014-02-28 09:32:38,011 INFO  [ImapSSLServer-13] [ip=192.168.27.36;oip=192.168.27.37;
      via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;] mailop - adding folder
      Comments: id=17, parentId=11.
mailbox.log:2014-02-28 09:32:38,012 INFO  [ImapSSLServer-13] [ip=192.168.27.36;oip=192.168.27.37;
      via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;] mailop - adding folder
      USER_ROOT: id=1, parentId=11.
mailbox.log:2014-02-28 09:32:38,012 INFO  [ImapSSLServer-13] [ip=192.168.27.36;oip=192.168.27.37;
      via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;] mailop - adding folder Inbox:
      id=2, parentId=1.
mailbox.log:2014-02-28 09:32:38,013 INFO  [ImapSSLServer-13] [ip=192.168.27.36;oip=192.168.27.37;
      via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;] mailop - adding folder Trash:
      id=3, parentId=1.
mailbox.log:2014-02-28 09:32:38,013 INFO  [ImapSSLServer-13] [ip=192.168.27.36;oip=192.168.27.37;
      via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;] mailop - adding folder Junk:
      id=4, parentId=1.
mailbox.log:2014-02-28 09:32:38,014 INFO  [ImapSSLServer-13] [ip=192.168.27.36;oip=192.168.27.37;
      via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;] mailop - adding folder Sent:
      id=5, parentId=1.
mailbox.log:2014-02-28 09:32:38,014 INFO  [ImapSSLServer-13] [ip=192.168.27.36;oip=192.168.27.37;
      via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;] mailop - adding folder Drafts:
      id=6, parentId=1.
mailbox.log:2014-02-28 09:32:38,015 INFO  [ImapSSLServer-13] [ip=192.168.27.36;oip=192.168.27.37;
      via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;] mailop - adding folder Contacts:
      id=7, parentId=1.
mailbox.log:2014-02-28 09:32:38,023 INFO  [ImapSSLServer-13] [ip=192.168.27.36;oip=192.168.27.37;
      via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;] mailop - adding folder Calendar:
      id=10, parentId=1.
mailbox.log:2014-02-28 09:32:38,023 INFO  [ImapSSLServer-13] [ip=192.168.27.36;oip=192.168.27.37;
      via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;] mailop - adding folder Tasks:
      id=15, parentId=1.
mailbox.log:2014-02-28 09:32:38,024 INFO  [ImapSSLServer-13] [ip=192.168.27.36;oip=192.168.27.37;
      via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;] mailop - adding folder
      Emailed Contacts: id=13, parentId=1.
mailbox.log:2014-02-28 09:32:38,024 INFO  [ImapSSLServer-13] [ip=192.168.27.36;oip=192.168.27.37;
      via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;] mailop - adding folder
      Chats: id=14, parentId=1.
mailbox.log:2014-02-28 09:32:38,025 INFO  [ImapSSLServer-13] [ip=192.168.27.36;oip=192.168.27.37;
      via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;] mailop - adding folder
      Briefcase: id=16, parentId=1.
mailbox.log:2014-02-28 09:32:38,038 INFO  [Index-8] [name=proxylogtest@zcs806.DOMAIN.com;mid=50;]
      index - Batch complete processed=0,failed=0,elapsed=1 (0.00 items/sec)
mailbox.log:2014-02-28 09:32:38,071 INFO  [ImapSSLServer-13] [ip=192.168.27.36;oip=192.168.27.37;
      via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;] index - OpenLuceneIndex
      impl=NIOFSDirectory,dir=/opt/zimbra/index/0/50/index/0
mailbox.log:2014-02-28 09:32:38,071 INFO  [ImapSSLServer-13] [ip=192.168.27.36;oip=192.168.27.37;
      via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;] mbxmgr - Mailbox 50
      account 0028aab0-3d17-4c51-aad8-da7500247079 CREATED
mailbox.log:2014-02-28 09:32:38,079 INFO  [ImapSSLServer-13] [name=proxylogtest@zcs806.DOMAIN.com;
      ip=192.168.27.36;oip=192.168.27.37;via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;]
      imap - user proxylogtest@zcs806.DOMAIN.com authenticated, mechanism=LOGIN [TLS]
mailbox.log:2014-02-28 09:32:38,079 INFO  [ImapSSLServer-13] [name=proxylogtest@zcs806.DOMAIN.com;
      ip=192.168.27.36;oip=192.168.27.37;via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;]
      imap - LOGIN elapsed=2550
mailbox.log:2014-02-28 09:32:46,258 WARN  [ImapSSLServer-16] [name=proxylogtest@zcs806.DOMAIN.com;
      ip=192.168.27.36;oip=192.168.27.37;via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;]
      imap - BAD parse error: command not implemented
mailbox.log:2014-02-28 09:32:46,258 INFO  [ImapSSLServer-16] [name=proxylogtest@zcs806.DOMAIN.com;
      ip=192.168.27.36;oip=192.168.27.37;via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;]
      imap - EXIT elapsed=1
mailbox.log:2014-02-28 09:32:48,648 WARN  [ImapSSLServer-13] [name=proxylogtest@zcs806.DOMAIN.com;
      ip=192.168.27.36;oip=192.168.27.37;via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;]
      imap - BAD parse error: command not implemented
mailbox.log:2014-02-28 09:32:48,648 INFO  [ImapSSLServer-13] [name=proxylogtest@zcs806.DOMAIN.com;
      ip=192.168.27.36;oip=192.168.27.37;via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;]
      imap - QUIT elapsed=1
</pre>


======IMAP Login Via Openssl - LOGIN TLS - Proxy Included======
Please see [[ManagingDomains#Domain_Catchall]]


You would run from the CLI:
===Rewriting From Address For Outbound Email===


<pre> openssl s_client -crlf -connect zcs806.DOMAIN.com:993</pre>
Please see [[ManagingDomains#Domain_Masquerading]]


Once it shows  "* OK IMAP4 ready" you'll be able to give the login command:
===Rewrite Recipient Address For Incoming Email===


<pre>tag login proxylogtest@zcs806.DOMAIN.com PASSWORD</pre>
There is a way to rewrite the incoming mail, but it's not a standard Zimbra feature. You can implement it as a configuration change in Postfix. Here's what you do:


Another good example of this is at [http://delog.wordpress.com/2011/05/10/access-imap-server-from-the-command-line-using-openssl/ Access IMAP server from the command line using OpenSSL]
# Create a file in /opt/zimbra/conf named 'postfix_recipientmap'. 
#* The format is a single line that reads something like: @alias.domain.com @domain.com
# Run 'postmap postfix_recipientmap' in the conf directory.
# Run "postconf -e recipient_canonical_maps=hash:/opt/zimbra/conf/postfix_recipientmap".
# Run 'postfix reload'.


The log events for this are:
This will cause postfix to map any incoming mail with a recipient of '@alias.domain.com' to '@domain.com'.  You will need to re-apply this postconf change after upgrades, though the postfix_recipientmap file should survive.


<pre>
===Automatic BCC===
$ egrep "192\.168\.27\.37|proxylogtest" * | grep "28 10"


audit.log:2014-02-28 10:37:51,207 INFO  [ImapSSLServer-13] [ip=192.168.27.36;oip=192.168.27.37;
====Option 1 - Via Postfix Customization====
    via=192.168.27.36(nginx/1.2.0-zimbra); ua=Zimbra/8.0.6_GA_5922;] security - cmd=Auth;
    account=proxylogtest@zcs806.DOMAIN.com; protocol=imap;


mailbox.log:2014-02-28 10:37:51,204 INFO  [ImapSSLServer-13] [ip=192.168.27.36;oip=192.168.27.37;
From the postfix website:
    via=192.168.27.36(nginx/1.2.0-zimbra); ua=Zimbra/8.0.6_GA_5922;] imap - ID elapsed=1
mailbox.log:2014-02-28 10:37:51,207 INFO  [ImapSSLServer-13] [name=proxylogtest@zcs806.DOMAIN.com;
    ip=192.168.27.36;oip=192.168.27.37; via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;]
    imap - user proxylogtest@zcs806.DOMAIN.com authenticated, mechanism=LOGIN [TLS]
mailbox.log:2014-02-28 10:37:51,207 INFO  [ImapSSLServer-13] [name=proxylogtest@zcs806.DOMAIN.com;
    ip=192.168.27.36;oip=192.168.27.37; via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;]
    imap - LOGIN elapsed=2
mailbox.log:2014-02-28 10:38:10,132 INFO  [ImapSSLServer-13] [name=proxylogtest@zcs806.DOMAIN.com;
    ip=192.168.27.36;oip=192.168.27.37; via=192.168.27.36(nginx/1.2.0-zimbra);ua=Zimbra/8.0.6_GA_5922;]
    imap - LIST elapsed=12


nginx.log:2014/02/28 10:32:01 [info] 25609#0: *2602 client 192.168.27.37 connected to 0.0.0.0:993
*always_bcc = address
nginx.log:2014/02/28 10:37:07 [info] 25609#0: *2603 client 192.168.27.37 connected to 0.0.0.0:993
** Deliver a copy of all mail to the specified address. In Postfix versions before 2.1, this feature is implemented by smtpd(8), qmqpd(8), or pickup(8).  
nginx.log:2014/02/28 10:37:51 [info] 25609#0: *2603 client logged in, client: 192.168.27.37, server: 0.0.0.0:993,
* sender_bcc_maps = type:table
    login: "proxylogtest@zcs806.DOMAIN.com", upstream: 192.168.27.36:7993
** Search the specified "type:table" lookup table with the envelope sender address for an automatic BCC address. This feature is available in Postfix 2.1 and later.  
    (192.168.27.37:41009-192.168.27.36:993) <=> (192.168.27.36:53613-192.168.27.36:7993)
* recipient_bcc_maps = type:table
</pre>
** Search the specified "type:table" lookup table with the envelope recipient address for an automatic BCC address. This feature is available in Postfix 2.1 and later.  
* Note: automatic BCC recipients are produced only for new mail. To avoid mailer loops, automatic BCC recipients are not generated for mail that Postfix forwards internally, nor for mail that Postfix generates itself.  


===Network Tracing Between A Remote Host And A ZCS MTA===
Please see the following:


How to network trace between a remote host and a ZCS MTA. You can run the following on the MTA to get the trace:
* A very nice forum post on the subject from our very own mmorse
** http://www.zimbra.com/forums/administrators/28606-master-incoming-outgoing-archive.html#post134490
* Postfix workaround
** http://www.postfix.com/ADDRESS_REWRITING_README.html#auto_bcc
* "User defined auto bcc"
** http://bugzilla.zimbra.com/show_bug.cgi?id=15306
* "Next rev of (mail) identities preferences management (server side)"
** http://bugzilla.zimbra.com/show_bug.cgi?id=17320


<pre> tcpdump -w /root/tcpdump1.cap -s 15000 port 25 and host <Sending_host_IP> </pre>
====Option 2 - Via ZCS Legal Intercept====


===zmmsgtrace===
Generally used for [[Ajcody-User-Management-Topics#Managing_Legal_Requests_for_Information|Managing Legal Requests for Information]]


See the following for details [for 7.1.1+]:
Description:
* zmmsgtrace replacement
:: The ZCS legal intercept feature is used to obtain copies of email messages that are sent, received, or saved as drafts from targeted accounts and send these message to a designated “shadow” email address. Legal Intercept can be configured to send the complete content of the message or to send only the header information. When a targeted account sends, receives, or saves a draft message, an intercept message is automatically created to forward copies of the messages as attachments to the specified email address.
** http://bugzilla.zimbra.com/show_bug.cgi?id=41078


===How To Get SMTP Debug Logging===
Please see:
* http://www.zimbra.com/docs/ne/latest/administration_guide/managing_other_zcs_features.8.1.html
* http://wiki.zimbra.com/index.php?title=Legal_Intercept
* http://bugzilla.zimbra.com/show_bug.cgi?id=17539


You can obtain this by modifying the master.cf.in which is located at /opt/zimbra/postfix/conf . 
====Option 3 - Zimbra's Archiving And Discovery====
Go to the smtpd line and at the end of the line add -vv


<pre> smtp      inet  n      -       n      -       -       smtpd -vv</pre>
See [[Ajcody-Notes-Archive-Discovery]] concerning A&D setup and options.


restart the mta by running the following
===Limiting Or Increasing Number Of Recipents / Messages===


<pre> zmmtactl restart</pre>
====Mailing Lists - Distribution Lists====


===Simple Troubleshooting For SMTP Via Telnet, Openssl===
Please see [[Ajcody-MailingLists-And-Mailman#Problems_Resolving_Virtual_Aliases_For_Members_Of_Large_Distribution_Lists]]
 
====Policy Daemon====
 
If you want to restrict messages per hour,  you can look into Policy Daemon:
 
* http://wiki.zimbra.com/wiki/Postfix_Policyd
* http://wiki.zimbra.com/wiki/How-to_for_cbpolicyd
* http://www.policyd.org/features.html


====First - Understanding Your Authentication Requirements In ZCS====
Beta release in ZCS 7 , see:


In the admin console, under the MTA tab, you see two options:
* "make support for postfix-policyd easier"
** http://bugzilla.zimbra.com/show_bug.cgi?id=8791


* Enable Authentication
====Postfix====
** Attribute Name = zimbraMtaSaslAuthEnable  [yes or no]
*** zmprov gacf zimbraMtaSaslAuthEnable or zmprov gs `zmhostname` zimbraMtaSaslAuthEnable
** Description = Value for postconf : smtpd_sasl_auth_enable = yes
* TLS Authentication Only
** Attribute Name = zimbraMtaTlsAuthOnly [TRUE or FALSE]
*** zmprov gacf zimbraMtaTlsAuthOnly or zmprov gs `zmhostname` zimbraMtaTlsAuthOnly
** Description Value for postconf : smtpd_tls_auth_only = yes


A good reference to understanding exactly what these options mean and do is the [http://www.postfix.org/SASL_README.html SASL_READ] at the postfix.org site. I'll include the highlights below.
Also, there are some default postfix parameters set to control sending a message to x amount recipients. The parameters you will need to look at are smtpd_recipient_limit & smtpd_recipient_overshoot_limit, these have a default value of 1000.


When you do the telnet test below and issue the EHLO state, you'll see a return that states [example]:
Postfix defines these parameters as:


<pre>
* smtpd_recipient_limit: The maximum number of recipients that the Postfix SMTP server accepts per message delivery request.
esx2:~ ajcody$ telnet zcs723.EXAMPLE.com 25
* smtpd_recipient_overshoot_limit: The number of recipients that a remote SMTP client can send in excess of the limit specified with $smtpd_recipient_limit, before the Postfix SMTP server increments the per-session error count for each excess recipient.
Trying 10.137.27.32...
Connected to zcs723.EXAMPLE.com.
Escape character is '^]'.
220 zcs723.EXAMPLE.com ESMTP Postfix
helo myworkstation
250 zcs723.EXAMPLE.com
ehlo myworkstation
250-zcs723.EXAMPLE.com
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-STARTTLS
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
</pre>


When you check, "Enable Authentication" [remember its specific to SALS] in the admin console and reload postfix you will then see the AUTH line when you do the telnet test above and AUTH will say LOGIN and PLAIN. AUTH supports a number of different types of protocols:  PLAIN LOGIN DIGEST-MD5 CRAM-MD5 GSSAPI. Zimbra only supports the use of LOGIN and PLAIN though.
From the command line you can change the default values.


What is LOGIN and PLAIN and the difference?
su - zimbra
postconf -e smtpd_recipient_limit=<new value>
postconf -e smtpd_recipient_overshoot_limit=<new value>
postfix reload


<pre>
====Bugs RFE's For Customers To Get Behind====
--enable-login  You wish to support the Outlook Express
                  5.x client, which uses the non-standard,
                  undocumented LOGIN protocol.  Passwords
                  are passed over the wire in the clear.
                  This is disabled by default.
--disable-plain  Do not use the PLAIN protocol, which
                  sends the password in plaintext.  This
                  is enabled by default and should only
                  be used for testing unless you are
                  encrypting the session via TLS, IPsec,
                  or other mechanism.
</pre>


So, the above might be alarming. The postfix SASL_README gives us some context though, '''''"Plaintext mechanisms (PLAIN, LOGIN) send credentials unencrypted. This information should be protected by an additional security layer such as a TLS-encrypted SMTP session (see: [http://www.postfix.org/TLS_README.html TLS_README])."''''' Also note, both PLAIN and LOGIN use BASE64 encoding of the username and password but those strings can be ran through a mime-decoder to discover what they are. You see this in my telnet examples below.
I'm wondering if policyd gives one the control everyone is looking for? I've not used it myself.


The other variable/options for the '''"Postfix SMTP Server policy - SASL mechanism properties"''' you will need to know about are:
Policyd References:
 
* http://www.policyd.org/tiki-index.php?page=Documentation
* /opt/zimbra/postfix/conf/main.cf
* http://www.policyd.org/tiki-index.php?page=Quotas&structure=Documentation
** smtpd_sasl_security_options =
* http://www.policyd.org/tiki-index.php?page=Accounting&structure=Documentation
** smtpd_sasl_tls_security_options = [note, this can reuse smtpd_sasl_security_options with $smtpd_sasl_security_options]
* http://www.policyd.org/tiki-index.php?page=Policies%20%26%20Groups&structure=Documentation
*** noanonymous Don't use mechanisms that permit anonymous authentication.  
* http://wiki.zimbra.com/index.php?title=Postfix_Policyd
**** Always set at least the noanonymous option. Otherwise, the Postfix SMTP server can give strangers the same authorization as a properly-authenticated client.  
*** noplaintext Don't use mechanisms that transmit unencrypted username and password information.  
*** nodictionary Don't use mechanisms that are vulnerable to dictionary attacks.  
*** forward_secrecy Require forward secrecy between sessions (breaking one session does not break earlier sessions).  
*** mutual_auth Use only mechanisms that authenticate both the client and the server to each other.  


'''Mail relay authorization options to know are:''' [http://www.postfix.org/SASL_README.html [From the SASL_READ]] With permit_sasl_authenticated the Postfix SMTP server can allow SASL-authenticated SMTP clients to send mail to remote destinations. Examples:
There's other additions [add-on's] one can get for policyd.
<pre>
    # With Postfix 2.10 and later, the mail relay policy is
    # preferably specified under smtpd_relay_restrictions.
    /opt/zimbra/postfix/conf/main.cf:
        smtpd_relay_restrictions =
    permit_mynetworks
    permit_sasl_authenticated
    reject_unauth_destination


    # Older configurations combine relay control and spam control under
We have this RFE in regards to policyd support:
    # smtpd_recipient_restrictions. To use this example with Postfix ≥
    # 2.10 specify "smtpd_relay_restrictions=".
    /opt/zimbra/postfix/conf/main.cf:
        smtpd_recipient_restrictions =
    permit_mynetworks
    permit_sasl_authenticated
    reject_unauth_destination
    ...other rules...
</pre>


'''Envelope sender address authorization options:'''  [http://www.postfix.org/SASL_README.html [From the SASL_READ]] By default an SMTP client may specify any envelope sender address in the MAIL FROM command. That is because the Postfix SMTP server only knows the remote SMTP client hostname and IP address, but not the user who controls the remote SMTP client.
* "make support for postfix-policyd easier"
** http://bugzilla.zimbra.com/show_bug.cgi?id=8791
*** Target Milestone currently for Helix release [ http://pm.zimbra.com ]
Other related rfe/bugs, specially to push variables into admin web console:


This changes the moment an SMTP client uses SASL authentication. Now, the Postfix SMTP server knows who the sender is. Given a table of envelope sender addresses and SASL login names, the Postfix SMTP server can decide if the SASL authenticated client is allowed to use a particular envelope sender address:
* "rate limit amount of mail sent via web client"
<pre>
** http://bugzilla.zimbra.com/show_bug.cgi?id=22300
    /opt/zimbra/postfix/conf/main.cf:
*** *Target Milestone currently for Helix release
        virtual_mailbox_maps = proxy:ldap:/opt/zimbra/conf/ldap-vmm.cf
* "mta "advanced" tab"
        smtpd_sender_login_maps = $virtual_mailbox_maps
** http://bugzilla.zimbra.com/show_bug.cgi?id=14645
*** Target Milestone currently for Helix release
* "Option to IP Blocking through UI"
** http://bugzilla.zimbra.com/show_bug.cgi?id=19240
*** Target Milestone currently for Helix release
* "Mail policies and access control for sending to distribution lists"
** http://bugzilla.zimbra.com/show_bug.cgi?id=9620
*** Target Milestone currently for GunsNRoses


        smtpd_recipient_restrictions =
===Controlling SMTPD Client Connections===
            ...
            reject_sender_login_mismatch
    permit_sasl_authenticated
            ...
</pre>
The controlled_envelope_senders table specifies the binding between a sender envelope address and the SASL login names that own that address [see above, ZCS will have in main.cf a line showing virtual_mailbox_maps = proxy:ldap:/opt/zimbra/conf/ldap-vmm.cf]:
<pre>
    /opt/zimbra/conf/ldap-vmm.cf
        server_host = ldap://zcs723.EXAMPLE.com:389
        server_port = 389
        search_base =
        query_filter = (&(zimbraMailDeliveryAddress=%s)(zimbraMailStatus=enabled))
        result_attribute = zimbraMailDeliveryAddress
        version = 3
        start_tls = yes
        tls_ca_cert_dir = /opt/zimbra/conf/ca
        bind = yes
        bind_dn = uid=zmpostfix,cn=appaccts,cn=zimbra
        bind_pw = XXXXXXXXXXX
        timeout = 30
</pre>


A default postfix install [non-ZCS] might have something like:
Mmorse did a good write up on these variables in the forum:
<pre>
    /etc/postfix/controlled_envelope_senders
        # envelope sender          owners (SASL login names)
        john@example.com            john@example.com
        helpdesk@example.com        john@example.com, mary@example.com
        postmaster                  admin@example.com
        @example.net                barney, fred, john@example.com, mary@example.com
</pre>
With this, the reject_sender_login_mismatch restriction above will reject the sender address in the MAIL FROM command if smtpd_sender_login_maps does not specify the SMTP client's login name as an owner of that address.


See also reject_authenticated_sender_login_mismatch and reject_unauthenticated_sender_login_mismatch for additional control over the SASL login name and the envelope sender.
* http://www.zimbra.com/forums/administrators/13591-solved-limit-max-recipriants.html#post69582


====Second - Encoding Username And Passwords For AUTH Sequence====
Postfix Resources At Their Site (All Clients/Connections):
* [http://www.postfix.org/TUNING_README.html#conn_limit Measures against clients that make too many connections]
* [http://www.postfix.org/anvil.8.html  anvil - Postfix session count and request rate control]
* [http://www.postfix.org/postconf.5.html#anvil_rate_time_unit anvil_rate_time_unit - The time unit over which client connection rates and other rates are calculated.]
* [http://www.postfix.org/postconf.5.html#smtpd_client_connection_count_limit smtpd_client_connection_count_limit - How many simultaneous connections any client is allowed to make to this service. ]
* [http://www.postfix.org/postconf.5.html#smtpd_client_message_rate_limit smtpd_client_message_rate_limit - The maximal number of message delivery requests that any client is allowed to make to this service per time unit, regardless of whether or not Postfix actually accepts those messages.]
* [http://www.postfix.org/postconf.5.html#smtpd_client_recipient_rate_limit smtpd_client_recipient_rate_limit - The maximal number of recipient addresses that any client is allowed to send to this service per time unit, regardless of whether or not Postfix actually accepts those recipients.]
* [http://www.postfix.org/postconf.5.html#smtpd_client_connection_rate_limit smtpd_client_connection_rate_limit - The maximal number of connection attempts any client is allowed to make to this service per time unit.]


Here is an example of getting the base64 encoding for a username and also how to check if the encoding was correct. This might expose how special characters threw off the encoding.
Postfix Resources At Their Site (Exceptions To Clients/Connections Or Single Source):
* [http://www.postfix.org/postconf.5.html#smtpd_client_event_limit_exceptions smtpd_client_event_limit_exceptions - Clients that are excluded from connection count, connection rate, or SMTP request rate restrictions.]


<pre>
===Restrictions===
[USERNAME EXAMPLE - If you use the domainname, you'll have to \ the @]
# perl -MMIME::Base64 -le 'print encode_base64("ajcody\@zcs723.EXAMPLE.com");'
    YWpjb2R5QHpjczcyMy5FWEFNUExFLmNvbQ==
# perl -MMIME::Base64 -le 'print decode_base64("YWpjb2R5QHpjczcyMy5FWEFNUExFLmNvbQ==");'
    ajcody@zcs723.EXAMPLE.com


[PASSWORD EXAMPLE]
Besides using external mailing list software, [[Ajcody-MailingLists-And-Mailman#Mailman_-_Mailing_List_Manager|Mailman]] or [[Ajcody-MailingLists-And-Mailman#Sympa_-_Mailing_List_Manager|Sympa]], here's some other topical items in regards to restrictions.
# perl -MMIME::Base64 -le 'print encode_base64("MySimplePa33");'
    TXlTaW1wbGVQYTMz
# perl -MMIME::Base64 -le 'print decode_base64("TXlTaW1wbGVQYTMz");'
    MySimplePa33


[USERNAME And PASSWORD - For Auth PLAIN. The \000 is for a space .]
Some user contributed articles:
# perl -MMIME::Base64 -le 'print encode_base64("ajcody\@zcs723.EXAMPLE.com\000MySimplePa33");'
    YWpjb2R5QHpjczcyMy5FWEFNUExFLmNvbQBNeVNpbXBsZVBhMzM=
# perl -MMIME::Base64 -le 'print decode_base64("YWpjb2R5QHpjczcyMy5FWEFNUExFLmNvbQBNeVNpbXBsZVBhMzM=");'
    ajcody@zcs723.EXAMPLE.comMySimplePa33
</pre>


====For ESMTP Auth is LOGIN - Example====
* [[RestrictPostfixRecipients]]
* [[Restrict_sending_to_certain_domains]]
* [[Restrict_users_to_certain_domain]]
* [http://www.zimbra.com/forums/administrators/15041-guide-postifx-how-multiple-access-lists-protected-distribution-lists.html Forum Post: GUIDE: Postifx: HOW TO: Multiple access lists for protected Distribution-lists]


If you are using TLS you will need to encrypt your username & password before transiting it.
Some Postfix references:


For Auth is LOGIN you'll need to get the login encoding as described above. When AUTH is Login, it requires username and password to be separate :
* http://www.postfix.org/RESTRICTION_CLASS_README.html#internal
* http://www.postfix.org/SMTPD_POLICY_README.html


For example [I've mangled the hash below by the way]:
Some RFE's related to mta based restrictions [targets are based upon today - July 21, 2010]:


perl -MMIME::Base64 -e 'print encode_base64("ajcody\@zcs723.EXAMPLE.com");'
* "Dynamic distribution lists - Internal Directory"
  YYYYYYY5QHpjczcyMy51cy56aW1icmFsYWIuY29t
** http://bugzilla.zimbra.com/show_bug.cgi?id=3884
perl -MMIME::Base64 -e 'print encode_base64("Somepasswd");'
* "per-domain send restriction" - Not Committed
  YYYYYYYkMW0=
** http://bugzilla.zimbra.com/show_bug.cgi?id=5595
 
*** These are marked as dup's of the above:
The working example now using telnet:
**** "disable outbound e-mail for one user"
 
***** http://bugzilla.zimbra.com/show_bug.cgi?id=34654
<pre>
**** "Add an facility to detemine internal relay users in admin"
esx2:~ ajcody$ telnet zcs723.EXAMPLE.com 25
***** http://bugzilla.zimbra.com/show_bug.cgi?id=33255
Trying 10.137.27.32...
* "policy for who can send to a distribution lists" - Helix
Connected to zcs723.EXAMPLE.com.
** http://bugzilla.zimbra.com/show_bug.cgi?id=9620
Escape character is '^]'.
*** RFE 9620 is also a blocker for the following RFE:
220 zcs723.EXAMPLE.com ESMTP Postfix
**** "milter to check if sender can send to a distribution list"
helo myworkstation
***** http://bugzilla.zimbra.com/show_bug.cgi?id=46311
250 zcs723.EXAMPLE.com
*** These are marked as dup's of the above:
ehlo myworkstation
**** "Ability to Specify Mail Policy"
250-zcs723.EXAMPLE.com
***** http://bugzilla.zimbra.com/show_bug.cgi?id=5555
250-PIPELINING
**** "domain level filters rules"
250-SIZE 10240000
***** http://bugzilla.zimbra.com/show_bug.cgi?id=6128
250-VRFY
**** "Distribution List Restrictions"
250-ETRN
***** http://bugzilla.zimbra.com/show_bug.cgi?id=7104
250-STARTTLS
**** "Feature request - Mail Policies"
250-AUTH LOGIN PLAIN
***** http://bugzilla.zimbra.com/show_bug.cgi?id=9328
250-AUTH=LOGIN PLAIN
**** "limit  "send from"  to certain domains"
250-ENHANCEDSTATUSCODES
***** http://bugzilla.zimbra.com/show_bug.cgi?id=12038
250-8BITMIME
**** "'Internal email only' options in admin control panel"
250 DSN
***** http://bugzilla.zimbra.com/show_bug.cgi?id=16671
AUTH LOGIN
**** "Access control for free busy and resources (ie permission to invite)"
334 VXNlcm5hbWU6
***** http://bugzilla.zimbra.com/show_bug.cgi?id=22913
YYYYYYY5QHpjczcyMy51cy56aW1icmFsYWIuY29t
**** "RFE: Admin GUI: Restrict the use of Distribution List among users."
334 UGFzc3dvcmQ6
***** http://bugzilla.zimbra.com/show_bug.cgi?id=29305
YYYYYYYkMW0=
* "Implement smtpd_sender_restrictions"
235 2.7.0 Authentication successful
** http://bugzilla.zimbra.com/show_bug.cgi?id=15808
mail from: <ajcody@zcs723.EXAMPLE.com>
* "How to restrict a user to only send via zwc"
250 2.1.0 Ok
** http://bugzilla.zimbra.com/show_bug.cgi?id=16623
rcpt to: <ajcody2@zcs723.EXAMPLE.com>
* "enable configuration of  "smtpd_sender_restriction""
250 2.1.5 Ok
** http://bugzilla.zimbra.com/show_bug.cgi?id=22363
data
354 End data with <CR><LF>.<CR><LF>
From: Adam <ajcody@zcs723.EXAMPLE.com>
To: Adam 2 <ajcody2@zcs723.EXAMPLE.com>
Subject: Test ESMTP Auth LOGIN
testing
.
250 2.0.0 Ok: queued as 361C11E78D1
quit
221 2.0.0 Bye
Connection closed by foreign host.
</pre>


====For ESMTP Auth is Plain - Example====
===Spam Control And Related Issues===


If you are using TLS you will need to encrypt your username & password before transiting it.
====High Over View Steps Of What To Do====


When AUTH is PLAIN, the username and password will be in the same encoding. For example [I've mangled the hash below by the way]:
* '''Step 1:''' Confirm your not an open relay and double check your postfix $mynetworks variable.
 
** [[ZimbraMtaMyNetworks|ZimbraMtaMyNetworks And Postfix mynetworks]]
perl -MMIME::Base64 -e 'print encode_base64("\000ajcody\@zcs723.EXAMPLE.com\000mypassword");'  
** [[Ajcody-MTA-Postfix-Topics#Open_Relay_Check|Open Relay Check]]
  AGFqY29keUB6Y3M3MjMXXXXXXXXXXXXXXXXXX5MzkzMWQxbQ==
* '''Step 2:''' Stop or put on-hold mail queue.
 
** Put all messages into HOLD queue:
The working example now using telnet:
*** Get a report of your current mailq [can be useful if you clean out the queue later but need to identify what external mail hosts are now denying you and who you'll need to contact about getting removed from their denial list]
 
**** Example: /opt/zimbra/postfix/sbin/mailq > /tmp/zimbra_mailq_report.txt
<pre>
*** /opt/zimbra/postfix/sbin/postsuper -h ALL
esx2:~ ajcody$ telnet zcs723.EXAMPLE.com 25
** Or put all messages match compromised account into HOLD queue:
Trying 10.137.27.32...
*** /opt/zimbra/postfix/sbin/mailq | grep user_compromised@domain | awk '{ print $1 }' | tr -d '!*' | /opt/zimbra/postfix/sbin/postsuper -h -
Connected to zcs723.EXAMPLE.com.
**** Note, this is an example - you might with the grep grab more than the compromised account with the match.
Escape character is '^]'.
** See whole section - [[Ajcody-MTA-Postfix-Topics#Managing_Postfix_Queue| Managing The Postfix Queue]]
220 zcs723.EXAMPLE.com ESMTP Postfix
* '''Step 3:''' Check your mail log [On ZCS servers running MTA services] - /var/log/zimbra.log
helo myworkstation
** [[Ajcody-MTA-Postfix-Topics#Understanding_.2Fvar.2Flog.2Fzimbra.log_And_Postfix_Log_Events| Understanding the zimbra.log file and Postfix log events.]] , see subsection about queue ID and message ID also.
250 zcs723.EXAMPLE.com
** [[Ajcody-MTA-Postfix-Topics#Who.27s_My_Spammer.3F| Who's My Spammer?]]
ehlo myworkstation
* '''Step 4:''' Identify compromised account authenticating SMTP AUTH connection or block ip address where emails are coming from at firewall.
250-zcs723.EXAMPLE.com
** [[Ajcody-MTA-Postfix-Topics#Who.27s_My_Spammer.3F| Who's My Spammer?]]
250-PIPELINING
** Continue to monitor compromised account and block ip addresses:
250-SIZE 10240000
*** tail -f /var/log/zimbra.log | grep username | grep sasl
250-VRFY
**** Jun  8 18:14:10 mail postfix/smtpd[15794]: 004358EEB16: client=unknown[XXXX.236.197.216], sasl_method=LOGIN, sasl_username=username@domain
250-ETRN
* '''Step 5:''' Disable the exploited email account, expire auth session, etc.
250-STARTTLS
** [[Ajcody-User-Management-Topics#Resetting_A_User.27s_Account_From_CLI| Resetting Or Expiring User Auth]]
250-AUTH LOGIN PLAIN
** '''Note''' - Restarting the mta services will be important once you reset the password/s or lock the account. It's required to ensure the active connections will be closed and any existing auth tokens no longer are valid. See:
250-AUTH=LOGIN PLAIN
*** Force currently active SMTP authenticated sessions to be renegotiated when locking an account
250-ENHANCEDSTATUSCODES
**** https://bugzilla.zimbra.com/show_bug.cgi?id=80299
250-8BITMIME
* '''Step 6:''' Move the mail queue or delete the spam email
250 DSN
** See whole section - [[Ajcody-MTA-Postfix-Topics#Managing_Postfix_Queue| Managing The Postfix Queue]]
AUTH PLAIN AGFqY29keUB6Y3M3MjMXXXXXXXXXXXXXXXXXX5MzkzMWQxbQ==
* '''Step 7:''' Release Mail queue
235 2.7.0 Authentication successful
mail from: <ajcody@zcs723.EXAMPLE.com>
250 2.1.0 Ok
rcpt to: <ajcody2@zcs723.EXAMPLE.com>
250 2.1.5 Ok
data
354 End data with <CR><LF>.<CR><LF>
From: Adam <ajcody@zcs723.EXAMPLE.com>
To: Adam 2 <ajcody2@zcs723.EXAMPLE.com>
Subject: Test ESMTP Auth PLAIN
testing
.
250 2.0.0 Ok: queued as 804E01E78D1
quit
221 2.0.0 Bye
Connection closed by foreign host.
</pre>


====For TLS/SSL - Example====
====Who's My Spammer?====


Basic telnet does not support SSL or TLS, so you have to use openssl or stunnel to make your connection to the smtp server. To connect to a server using TLS/SSL run something like this:
=====Getting Some Initial Summary Data=====


openssl s_client -starttls smtp -crlf -connect zcs723.EXAMPLE.com:25
======zmdialyreport======


Now you can run one of the above telnet sessions like you had before. You will most likely still need to log in.
First, some notable bug/RFE's in regards to the zmdailyreport:


Default zimbra [[Ports|ports]] to be aware of and test:
* RFE - add explanations to Daily mail report / pflogsumm.pl output
** https://bugzilla.zimbra.com/show_bug.cgi?id=86630
* Daily mail report shows incorrect output because pflogsumm.pl doubles the result
** https://bugzilla.zimbra.com/show_bug.cgi?id=84444
* Descriptions of mta_counts numbers vs daily reports and other msg stats
** https://bugzilla.zimbra.com/show_bug.cgi?id=79632


* port 25
You can first get some summary data by doing the following:
** smtp [mta] - incoming mail to postfix
* port 465
** smtps [mta] - incoming mail to postfix over ssl '''(Outlook only)'''
* port 587
** smtp [mta] - Mail '''submission port''' over tls
* "RFC 3207 specifies only the well-known port 25 and the "Submission port," which is TCP port 587, for the STARTTLS command, the precursor for an encrypted SMTP session using TLS. It makes no mention of the unofficial port 465." [http://en.wikipedia.org/wiki/Simple_Mail_Transfer_Protocol SMTP on Wikipedia]
 
An example login is below :


<pre>
<pre>
esx2:~ ajcody$ openssl s_client -starttls smtp -crlf -connect zcs723.EXAMPLE.com:25
[zimbra@zcs806 ~]$ /opt/zimbra/libexec/zmdailyreport


CONNECTED(00000003)
Grand Totals
depth=0 /C=US/ST=N/A/O=Zimbra Collaboration Suite/OU=Zimbra Collaboration Suite/CN=zcs723.EXAMPLE.com
------------
verify error:num=20:unable to get local issuer certificate
messages
verify return:1
depth=0 /C=US/ST=N/A/O=Zimbra Collaboration Suite/OU=Zimbra Collaboration Suite/CN=zcs723.EXAMPLE.com
verify error:num=27:certificate not trusted
verify return:1
depth=0 /C=US/ST=N/A/O=Zimbra Collaboration Suite/OU=Zimbra Collaboration Suite/CN=zcs723.EXAMPLE.com
verify error:num=21:unable to verify the first certificate
verify return:1
---
Certificate chain
0 s:/C=US/ST=N/A/O=Zimbra Collaboration Suite/OU=Zimbra Collaboration Suite/CN=zcs723.EXAMPLE.com
  i:/C=US/ST=N/A/L=N/A/O=Zimbra Collaboration Suite/OU=Zimbra Collaboration Suite/CN=zcs723.EXAMPLE.com
---
Server certificate
-----BEGIN CERTIFICATE-----
MIICsjCCAhugAwIBAgIFE2MYV2EwDQYJKoZIhvcNAQEFBQAwgZUxCzAJBgNVBAYT
[cut]
LrFtuUlX6mb5Uq8dx8D25QWqsyeDXA==
-----END CERTIFICATE-----
subject=/C=US/ST=N/A/O=Zimbra Collaboration Suite/OU=Zimbra Collaboration Suite/CN=zcs723.EXAMPLE.com
issuer=/C=US/ST=N/A/L=N/A/O=Zimbra Collaboration Suite/OU=Zimbra Collaboration Suite/CN=zcs723.EXAMPLE.com
---
No client certificate CA names sent
---
SSL handshake has read 1528 bytes and written 360 bytes
---
New, TLSv1/SSLv3, Cipher is DHE-RSA-AES256-SHA
Server public key is 1024 bit
Secure Renegotiation IS supported
Compression: NONE
Expansion: NONE
SSL-Session:
    Protocol  : TLSv1
    Cipher    : DHE-RSA-AES256-SHA
    Session-ID: 06F03A7C2AB0EA3E97cut7CD4A4A6166D551B
    Session-ID-ctx:
    Master-Key: 1A2FF452C3E09F9D7B2DECEcutFB67158960BA6
    Key-Arg  : None
    Start Time: 1370375286
    Timeout  : 300 (sec)
    Verify return code: 21 (unable to verify the first certificate)
---
250 DSN
helo myworkstation
250 zcs723.EXAMPLE.com
ehlo myworkstation
250-zcs723.EXAMPLE.com
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
AUTH LOGIN
334 VXNlcm5hbWU6
YYYYYYY5QHpjczcyMy51cy56aW1icmFsYWIuY29t
334 UGFzc3dvcmQ6
YYYYYYYkMW0=
235 2.7.0 Authentication successful
mail from:<ajcody@zcs723.EXAMPLE.com>
250 2.1.0 Ok
rcpt to: <ajcody2@zcs723.EXAMPLE.com>
250 2.1.5 Ok
data
354 End data with <CR><LF>.<CR><LF>
From: Adam <ajcody@zcs723.EXAMPLE.com>
To: Adam 2 <ajcody2@zcs723.EXAMPLE.com>
Subject: Test Auth LOGIN TLS Example
test
.
250 2.0.0 Ok: queued as BA68B1E78D1
quit
221 2.0.0 Bye
closed
</pre>


=====Testing Against Port 465=====
      7  received
    11  delivered
      0  forwarded
      0  deferred
      0  bounced
      3  rejected (21%)
      0  reject warnings
      0  held
      0  discarded (0%)


References on Port 465:
  2780  bytes received
  10914  bytes delivered
      2  senders
      1  sending hosts/domains
      1  recipients
      1  recipient hosts/domains


* http://wiki.zimbra.com/wiki/Mail_client_Configuration#SMTP_over_SSL_port_465


<pre>
Per-Hour Traffic Summary
$ openssl s_client -crlf -connect zcs723.EXAMPLE.com:465
    time          received  delivered  deferred    bounced    rejected
 
    --------------------------------------------------------------------
CONNECTED(00000003)
    0000-0100          0          0          0          0          0
 
    0100-0200          1          3          0          0          0
[cut of repeated data above]
    0200-0300          0          0          0          0          0
 
    0300-0400          0          0          0          0          0
---
    0400-0500          0          0          0          0          0
250 DSN
    0500-0600          0          0          0          0          0
helo myworkstation
    0600-0700          0          0          0          0          0
250 zcs723.EXAMPLE.com
    0700-0800          1          0          0          0          2
ehlo myworkstation
    0800-0900          1          0          0          0          0
250-zcs723.EXAMPLE.com
    0900-1000          0          0          0          0          1
250-PIPELINING
    1000-1100          0          0          0          0          0
250-SIZE 8388608
    1100-1200          0          0          0          0          0
250-VRFY
    1200-1300          4          8          0          0          0
250-ETRN
    1300-1400          0          0          0          0          0
250-AUTH PLAIN LOGIN
    1400-1500          0          0          0          0          0
250-AUTH=PLAIN LOGIN
    1500-1600          0          0          0          0          0
250-ENHANCEDSTATUSCODES
    1600-1700          0          0          0          0          0
250-8BITMIME
    1700-1800          0          0          0          0          0
250 DSN
    1800-1900          0          0          0          0          0
AUTH PLAIN [cut - emailaddress/password string goes here]
    1900-2000          0          0          0          0          0
    2000-2100          0          0          0          0          0
    2100-2200          0          0          0          0          0
    2200-2300          0          0          0          0          0
    2300-2400          0          0          0          0          0


!!! note - you get the auth plain string by doing [don't remove the \000 parts]:
Host/Domain Summary: Message Delivery (top 50)
!!! perl -MMIME::Base64 -e 'print encode_base64("\000user\@mdomain.com\000your_password");'
sent cnt  bytes  defers  avg dly max dly host/domain
 
-------- -------  -------  ------- ------- -----------
235 2.7.0 Authentication successful
    11    10914        0    7.4 s  24.0 s  zcs806.DOMAIN.com
mail from:<ajcody@zcs723.EXAMPLE.com>
250 2.1.0 Ok
rcpt to: <ajcody2@zcs723.EXAMPLE.com>
250 2.1.5 Ok
data
354 End data with <CR><LF>.<CR><LF>
From: Adam <ajcody@zcs723.EXAMPLE.com>
To: Adam 2 <ajcody2@zcs723.EXAMPLE.com>
Subject: Test Auth LOGIN TLS Example
test
.
250 2.0.0 Ok: queued as BA68B1E78D1
quit
221 2.0.0 Bye
closed
</pre>


Example of logs events in /var/log/zimbra.log on the mta server [different test from the one above]:
Host/Domain Summary: Messages Received (top 50)
msg cnt  bytes  host/domain
-------- -------  -----------
      5    2780  zcs806.DOMAIN.com


<pre>
top 50 Senders by message count
Jun  7 08:28:52 zcs806 postfix/smtps/smtpd[8151]: connect from unknown[10.X.X.110]
-------------------------------
Jun  7 08:28:52 zcs806 postfix/smtps/smtpd[8151]: Anonymous TLS connection established
      4  zimbra@zcs806.DOMAIN.com
  from unknown[10.1X.X.110]: TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)
      1   admin@zcs806.DOMAIN.com
Jun  7 08:31:53 zcs806 saslauthd[3317]: zmauth: authenticating against elected url
  https://zcs806.us.DOMAIN.com:7071/service/admin/soap/' ...
Jun  7 08:31:53 zcs806 saslauthd[3317]: zmpost: url='https://zcs806.us.DOMAIN.com:7071/
  service/admin/soap/' returned buffer->data='<soap:Envelope xmlns:soap="
  http://www.w3.org/2003/05/soap-envelope"><soap:Header><context xmlns="urn:zimbra">
  <change token="75599"/></context></soap:Header><soap:Body><AuthResponse
  xmlns="urn:zimbraAccount"><authToken>0_b47233e5e226eb1c0519cd9c35da2fc198f[cut]272
  613b</authToken><lifetime>172800000</lifetime><skin>serenity</skin></AuthResponse>
  </soap:Body></soap:Envelope>', hti->error=''
Jun  7 08:31:53 zcs806 saslauthd[3317]: auth_zimbra: admin@zcs806.us.DOMAIN.com auth OK
Jun  7 08:32:47 zcs806 postfix/smtps/smtpd[8151]: 0279C3434: client=unknown[10.X.X.110],
  sasl_method=PLAIN, sasl_username=admin@zcs806.us.DOMAIN.com
Jun  7 08:33:32 zcs806 postfix/qmgr[3484]: 0279C3434: from=<admin@zcs806.us.DOMAIN.com>,
  size=400, nrcpt=1 (queue active)
Jun  7 08:33:33 zcs806 postfix/dkimmilter/smtpd[9661]: connect from localhost[127.0.0.1]
Jun  7 08:33:33 zcs806 postfix/dkimmilter/smtpd[9661]: Anonymous TLS connection established
  from localhost[127.0.0.1]: TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)
Jun  7 08:33:33 zcs806 postfix/dkimmilter/smtpd[9661]: 0F798344C: client=localhost[127.0.0.1]
Jun  7 08:33:33 zcs806 postfix/cleanup[9638]: 0F798344C: message-id=<20140607153247.0279C3434@DOMAIN.com>
Jun  7 08:33:33 zcs806 postfix/smtp[9660]: 0279C3434: to=<test@zcs806.us.DOMAIN.com>,
  relay=127.0.0.1[127.0.0.1]:10030, delay=63, delays=63/0.06/0.07/0.07, dsn=2.0.0, status=sent
  (250 2.0.0 Ok: queued as 0F798344C)
Jun  7 08:33:33 zcs806 postfix/dkimmilter/smtpd[9661]: disconnect from localhost[127.0.0.1]
Jun  7 08:33:33 zcs806 postfix/qmgr[3484]: 0F798344C: from=<admin@zcs806.us.DOMAIN.com>,
  size=627, nrcpt=1 (queue active)
Jun  7 08:33:33 zcs806 postfix/qmgr[3484]: 0279C3434: removed
Jun  7 08:33:38 zcs806 postfix/smtps/smtpd[8151]: disconnect from unknown[10.X.X.110]
</pre>


====To Confirm An Auth User Can't Send With Another FROM Address====
top 50 Recipients by message count
----------------------------------
    11  admin@zcs806.DOMAIN.com


The below example is using an auth has for ajcody@zcs723.EXAMPLE.com .
top 50 Senders by message size
------------------------------
  1974  zimbra@zcs806.DOMAIN.com
    806  admin@zcs806.DOMAIN.com


<pre>
top 50 Recipients by message size
esx2:~ ajcody$ telnet zcs723.EXAMPLE.com 25
---------------------------------
Trying 10.137.27.32...
  10914  admin@zcs806.DOMAIN.com
Connected to zcs723.EXAMPLE.com.
 
Escape character is '^]'.
message deferral detail: none
220 zcs723.EXAMPLE.com ESMTP Postfix
 
helo myworkstation
message bounce detail (by relay): none
250 zcs723.EXAMPLE.com
 
ehlo myworkstation
message reject detail
250-zcs723.EXAMPLE.com
---------------------
250-PIPELINING
  MAIL
250-SIZE 10240000
    5.3.4 Message size exceeds fixed limit (total: 3)
250-VRFY
          3  domain-ext.com
250-ETRN
 
250-STARTTLS
message reject warning detail: none
250-AUTH LOGIN PLAIN
 
250-AUTH=LOGIN PLAIN
message hold detail: none
250-ENHANCEDSTATUSCODES
 
250-8BITMIME
message discard detail: none
250 DSN
AUTH PLAIN AGFqY29[cut]bQA5MzkzMWQxbQ==
235 2.7.0 Authentication successful
mail from: <admin@zcs723.EXAMPLE.com>
250 2.1.0 Ok
rcpt to: <ajcody2@zcs723.EXAMPLE.com>     
553 5.7.1 <admin@zcs723.EXAMPLE.com>: Sender address rejected: not owned by user ajcody@zcs723.EXAMPLE.com
</pre>


Notice how this is different when I'm telnet'ing from the server [localhost] back to itself.
smtp delivery failures: none


<pre>
Warnings
[root@zcs723 ~]# telnet localhost 25
--------
Trying ::1...
  sendmail (total: 3)
telnet: connect to address ::1: Connection refused
        1  or the command is run from a set-uid root process
Trying 127.0.0.1...
        1  the Postfix sendmail command has set-uid root file permissions
Connected to localhost.
        1  the Postfix sendmail command must be installed without set-uid ...
Escape character is '^]'.
  smtpd (total: 1)
220 zcs723.EXAMPLE.com ESMTP Postfix
        1   7A735345A: queue file size limit exceeded
helo myworkstation
 
250 zcs723.EXAMPLE.com
Fatal Errors: none
ehlo myworkstation
250-zcs723.EXAMPLE.com
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-STARTTLS
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
AUTH PLAIN AGFqY29kAAAAAAAAAAAAAAAAAAAAAAAmNvbQA5MzkzMWQxbQ==
235 2.7.0 Authentication successful
mail from: <admin@zcs723.EXAMPLE.com>
250 2.1.0 Ok
rcpt to: <ajcody2@zcs723.EXAMPLE.com>
250 2.1.5 Ok
Subject: Test mynetwork bypasses From match to AUTH
221 2.7.0 Error: I can break rules, too. Goodbye.
Connection closed by foreign host.
</pre>


===Adding A New MTA Server===
Panics: none


Basic instructions can be found here:
Master daemon messages: none
* http://www.zimbra.com/docs/ne/latest/multi_server_install/toc.html
</pre>
** See "Installing Zimbra MTA on a Server"


Additional instructions needed beyond the above will follow as I hear about them.
======client_usage_report.py======


===Load Balancing For SMTP - Out Bound Mail===
This will give some stats on your mail activity. Note, there are some issue with this script double reporting mail counts etc, but it's useful to identify the top 50 for activity.


Currently, '''5.x code''', you have the following options:
<pre>
[zimbra@zcs806 ~]$ /opt/zimbra/libexec/client_usage_report.py
Reading /opt/zimbra/log/access_log.2014-04-17 ..
Reading /opt/zimbra/log/access_log.2014-04-18 ..
Reading /opt/zimbra/log/access_log.2014-04-19 ..
Reading /opt/zimbra/log/access_log.2014-04-20 ..
Reading /opt/zimbra/log/access_log.2014-04-21 ..
Reading /opt/zimbra/log/access_log.2014-04-22 ..
Reading /opt/zimbra/log/access_log.2014-04-23 ..
Writing /opt/zimbra/zmstat/client_usage_report_2014-04-24.csv ..
</pre>


* Configure zimbraMtaRelayHost and zimbraSmtpHostname [[Ajcody-Server-Topics#Using_Different_SMTP_Server_For_Webclient_.28ZWC.29.2C_Mobiles.2C_And_ZCO|zimbraSmtpHostname Details]] to:
Then review the file it will create , it will give : "user_agent","client_IP","req_count"


** An external load balancing device that will then split the traffic behind it
<pre>
** Setup a round-robin A record situation in your DNS for the external mta's you'll be using.
[zimbra@zcs806 ~]$ cat /opt/zimbra/zmstat/client_usage_report_2014-04-24.csv
 
"user_agent","client_IP","req_count"
In, '''GNR/6.x''', you are able to add multiple targets to the variables and we'll have some degree of "balancing" between them.
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:28.0) Gecko/20100101 Firefox/28.0","192.168.1.166","14"
"Mozilla/5.0 (Windows NT 6.2; WOW64; rv:28.0) Gecko/20100101 Firefox/28.0","192.168.1.166","93"
"Mozilla/5.0 (Windows NT 6.1; WOW64; rv:28.0) Gecko/20100101 Firefox/28.0","192.168.1.174","6"
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:28.0) Gecko/20100101 Firefox/28.0","192.168.1.166","71"
</pre>


* "allow list for zimbraSmtpHostname"
======qshape======
** http://bugzilla.zimbra.com/show_bug.cgi?id=10695
* "make zimbraSmtpHostname fault tolerant"
** http://bugzilla.zimbra.com/show_bug.cgi?id=36173


===User Alias Mapping And Mail Transport with Postfix & LDAP===
You can also look at the results of [[http://www.postfix.org/qshape.1.html qshape]] - the default is the active queue. For more on qshape, see [[http://www.postfix.org/QSHAPE_README.html Postfix Qshape Readme]] .


See [[User_Alias_Mapping_and_Mail_Transport_with_Postfix_%26_LDAP]]
<pre>
qshape deferred
              T  5 10 20 40 80 160 320 640 1280 1280+
        TOTAL 12  0  0  0  0  0  0  0  0    0    12
    gmail.com  9  0  0  0  0  0  0  0  0    0    9
    yahoo.com  3  0  0  0  0  0  0  0  0    0    3
</pre>


====Multiple LDAP Servers?====
======3rd Party Log Reports - postfix-logwatch and amavis-logwatch======


Completed RFE:
Created RFE for us to include these in ZCS:


* "mta should be able to take a list of LDAP servers to take advantage of replicas."
* Include postfix-logwatch_and_amavis-logwatch
** http://bugzilla.zimbra.com/show_bug.cgi?id=9353
** https://bugzilla.zimbra.com/show_bug.cgi?id=89450
*** zmmtainit to allow for multiple command line options that will set the URL. Grab the contents of the ldap_url localconfig variable.


From :
You can download them from http://logreporters.sourceforge.net/ . It's a fairly simply install, download and then extract - cd into extracted directory and as root type :


* http://www.postfix.org/ldap_table.5.html
make install-standalone


<pre>
They will install to /usr/local/bin/amavis-logwatch & postfix-logwatch . The config files are in /usr/local/etc/amavis-logwatch.conf & postfix-logwatch.conf . Here's an example of the output.
        server_host (default: localhost)
              The name of the host running the LDAP server,  e.g.


                  server_host = ldap.example.com
/usr/local/bin/amavis-logwatch output example:


              Depending  on the LDAP client library you're using,
<pre>
              it should be possible to specify  multiple  servers
[root@zcs806 amavis-logwatch-1.51.02]# /usr/local/bin/amavis-logwatch /var/log/zimbra.log
              here,  with the library trying them in order should
****** Summary *************************************************************************************
              the first one fail. It should also be  possible  to
              give  each  server  in  the  list  a different port
              (overriding server_port below), by naming them like


                  server_host = ldap.example.com:1444
      4  Total messages scanned ------------------  100.00%
  1.926K  Total bytes scanned                          1,972
========  ==================================================


              With OpenLDAP, a (list of) LDAP URLs can be used to
      4  Passed ----------------------------------  100.00%
              specify both the hostname(s) and the port(s):
      4    Clean passed                            100.00%
========  ==================================================


                  server_host = ldap://ldap.example.com:1444
      4  Ham -------------------------------------  100.00%
                              ldap://ldap2.example.com:1444
      4    Clean passed                            100.00%
========  ==================================================


              All LDAP URLs accepted by the OpenLDAP library  are
              supported,  including  connections over UNIX domain
              sockets, and LDAP SSL (the last one  provided  that
              OpenLDAP was compiled with support for SSL):


                  server_host = ldapi://%2Fsome%2Fpath
==================================================================================
                              ldaps://ldap.example.com:636
Spam Score Percentiles        0%      50%       90%       95%      98%      100%
----------------------------------------------------------------------------------
Score Ham (4)            -1.900    -1.900    -1.900    -1.900    -1.900    -1.900
==================================================================================


**my note**
======================================================================================================
This thread - http://archives.neohapsis.com/archives/postfix/2004-09/1763.html
Spam Score Frequency      <= -10    <= -5      <= 0      <= 5    <= 10    <= 20    <= 30      > 30
give me the impression they made a mistake in modifying the help file on this
------------------------------------------------------------------------------------------------------
and they dropped the use/need of the command:
Hits (4)                      0        0        4        0        0        0        0        0
 
Percent of Hits            0.00%    0.00%   100.00%    0.00%    0.00%    0.00%    0.00%    0.00%
   server_host = ldap://ldap.example.com:1444, ldap://ldap2.example.com:1444
======================================================================================================
</pre>
</pre>


Just a small note on where var shows up:
/usr/local/bin/postfix-logwatch output example:


<pre>
<pre>
[root@mail3 conf]# pwd
[root@zcs806 amavis-logwatch-1.51.02]# /usr/local/bin/postfix-logwatch /var/log/zimbra.log
/opt/zimbra/conf
[root@mail3 conf]# grep server_host *
amavisd.conf.in:$myhostname = '@@zimbra_server_hostname@@';  # must be a fully-qualified domain name!
ldap-scm.cf:server_host = ldap://mail3.zimbra.DOMAIN.com:389
ldap-transport.cf:server_host = ldap://mail3.zimbra.DOMAIN.com:389
ldap-vad.cf:server_host = ldap://mail3.zimbra.DOMAIN.com:389
ldap-vam.cf:server_host = ldap://mail3.zimbra.DOMAIN.com:389
ldap-vmd.cf:server_host = ldap://mail3.zimbra.DOMAIN.com:389
ldap-vmm.cf:server_host = ldap://mail3.zimbra.DOMAIN.com:389
localconfig.xml:  <key name="zimbra_server_hostname">
zmmta.cf: LOCAL zimbra_server_hostname
zmmta.cf: POSTCONF myhostname LOCAL zimbra_server_hostname
</pre>


References:
****** Summary *************************************************************************************


* http://archives.neohapsis.com/archives/postfix/2000-04/0200.html
      1  *Warning: Queue file size limit exceeded


===Traditional Aliases Use - /etc/aliases type lookups===
  6.512K  Bytes accepted                              6,668
  1.928K  Bytes sent via SMTP                          1,974
  4.584K  Bytes sent via LMTP                          4,694
========  ==================================================


Filed this RFE:
      10  Accepted                                    76.92%
* "Support traditional email aliases via aliases file or ldap - admin console view"
      3  Rejected                                    23.08%
** http://bugzilla.zimbra.com/show_bug.cgi?id=33642
--------  --------------------------------------------------
*** Aliases use without being tied into authentication methods or consuming a license file.
      13  Total                                      100.00%
========  ==================================================


===Allowing Accounts To Change The From Address===
      3  5xx Reject message size                    100.00%
--------  --------------------------------------------------
      3  Total 5xx Rejects                          100.00%
========  ==================================================


Please see:
      10  Connections
      10  Disconnections
      8  Removed from queue
      4  Sent via SMTP
      4  Sent via LMTP
      4  Filtered


* [http://www.zimbra.com/forums/installation/18171-solved-setting-up-email-response-aliases-non-system-domains.html#post92121 Changing The From Field]
****** Detail (10) *********************************************************************************


====Related BUG/RFE's====
      3  5xx Reject message size -----------------------------------------------------------------
      3      192.168.1.166    remote.domain.com
      3        *unavailable
      3            *unavailable


* Identities: Auto verify user settable from address [marked as dup of 29974]
      4  Sent via SMTP ---------------------------------------------------------------------------
** http://bugzilla.zimbra.com/show_bug.cgi?id=12094
      4      zcs806.DOMAIN.com
* persona/external account from field address verification
** http://bugzilla.zimbra.com/show_bug.cgi?id=29974
* ZCO Support for zimbraAllowAnyFromAddress
** http://bugzilla.zimbra.com/show_bug.cgi?id=31278


===Creating A Domain Alias===
      4  Sent via LMTP ---------------------------------------------------------------------------
      4      zcs806.DOMAIN.com


Please see [[ManagingDomains#Creating_a_Domain_Alias]]
      4  Filtered --------------------------------------------------------------------------------
      2      smtp-amavis:[127.0.0.1]:10024
      2        Sender address
      1            admin@zcs806.DOMAIN.com
      1              admin@zcs806.DOMAIN.com
      1                  192.168.1.166    remote.domain.com
      1            user@DOMAIN.com
      1              admin@zcs806.DOMAIN.com
      1                  192.168.1.184    remote2.domain.com
      2      smtp-amavis:[127.0.0.1]:10026
      2        Sender address
      1            admin@zcs806.DOMAIN.com
      1              admin@zcs806.DOMAIN.com
      1                  192.168.1.166    remote.domain.com
      1            user@DOMAIN.com
      1              admin@zcs806.DOMAIN.com
      1                  192.168.1.184    remote2.domain.com


===Relay Domain Forwarding===
=== Delivery Delays Percentiles ============================================================
                    0%      25%      50%      75%      90%      95%      98%      100%
--------------------------------------------------------------------------------------------
Before qmgr      0.04      0.09      0.11      0.11      0.23      0.35      0.43      0.48
In qmgr          0.00      0.00      0.01      0.01      0.04      0.07      0.08      0.09
Conn setup        0.00      0.01      0.29      1.30      2.05      2.23      2.33      2.40
Transmission      0.10      2.81      4.85      9.60    21.00    21.00    21.00    21.00
Total            0.20      2.91      5.20    11.00    23.30    23.65    23.86    24.00
============================================================================================
</pre>


Please see [[ManagingDomains#Relaying.2FDomain_Forwarding]]
'''Note''' - First, look at the options each command has using the -h output. You might want to use --full when doing an investigation and also include a wildcard - /var/log/zimbra.lo* to take in all the log data. For example:


===Domain Catchall===
<pre>
[zimbra@zcs806 ~]$ /usr/local/bin/postfix-logwatch --full /var/log/zimbra.lo*
****** Summary *************************************************************************************


Please see [[ManagingDomains#Domain_Catchall]]
      9  *Fatal:  General fatal
      1  *Warning: Queue file size limit exceeded
      21  Miscellaneous warnings


===Rewriting From Address For Outbound Email===
710.888K  Bytes accepted                            727,949
193.036K  Bytes sent via SMTP                        197,669
520.114K  Bytes sent via LMTP                        532,597
========  ==================================================


Please see [[ManagingDomains#Domain_Masquerading]]
    1041  Accepted                                    99.71%
      3  Rejected                                    0.29%
--------  --------------------------------------------------
    1044  Total                                      100.00%
========  ==================================================


===Rewrite Recipient Address For Incoming Email===
      3  5xx Reject message size                    100.00%
--------  --------------------------------------------------
      3  Total 5xx Rejects                          100.00%
========  ==================================================


There is a way to rewrite the incoming mail, but it's not a standard Zimbra feature.  You can implement it as a configuration change in Postfix.  Here's what you do:
      65  Connections
      65  Disconnections
    1041  Removed from queue
    523  Sent via SMTP
    517  Sent via LMTP
      2  Bounced (local)
      1  Bounced (remote)
      9  Filtered
      2  Notifications sent


# Create a file in /opt/zimbra/conf named 'postfix_recipientmap'. 
      4  Timeouts (inbound)
#* The format is a single line that reads something like: @alias.domain.com @domain.com
      1  PIX workaround enabled
# Run 'postmap postfix_recipientmap' in the conf directory.
# Run "postconf -e recipient_canonical_maps=hash:/opt/zimbra/conf/postfix_recipientmap".
# Run 'postfix reload'.


This will cause postfix to map any incoming mail with a recipient of '@alias.domain.com' to '@domain.com'.  You will need to re-apply this postconf change after upgrades, though the postfix_recipientmap file should survive.
****** Detail (10) *********************************************************************************


===Automatic BCC===
      9  *Fatal:  General fatal -----------------------------------------------------------------
      3      Queue report unavailable - mail system is down
      3      Usage: sendmail [options]
      2      The Postfix mail system is not running
      1      Usage: send-mail [options]


====Option 1 - Via Postfix Customization====
      21  Miscellaneous warnings ------------------------------------------------------------------
      7      or the command is run from a set-uid root process
      7      the Postfix sendmail command has set-uid root file permissions
      7      the Postfix sendmail command must be installed without set-uid root file permissions


From the postfix website:
      3  5xx Reject message size -----------------------------------------------------------------
      3      10.X.X.166    fence.DOMAIN.com
      3        *unavailable
      3            *unavailable


*always_bcc = address
    523  Sent via SMTP ---------------------------------------------------------------------------
** Deliver a copy of all mail to the specified address. In Postfix versions before 2.1, this feature is implemented by smtpd(8), qmqpd(8), or pickup(8).
    507      86.lab
* sender_bcc_maps = type:table
      15      zcs806.DOMAIN.com
** Search the specified "type:table" lookup table with the envelope sender address for an automatic BCC address. This feature is available in Postfix 2.1 and later.  
      1     domaina.com
* recipient_bcc_maps = type:table
** Search the specified "type:table" lookup table with the envelope recipient address for an automatic BCC address. This feature is available in Postfix 2.1 and later.
* Note: automatic BCC recipients are produced only for new mail. To avoid mailer loops, automatic BCC recipients are not generated for mail that Postfix forwards internally, nor for mail that Postfix generates itself.  


Please see the following:
    517  Sent via LMTP ---------------------------------------------------------------------------
    507      86.lab
      10      zcs806.DOMAIN.com


* A very nice forum post on the subject from our very own mmorse
      2  Bounced (local) -------------------------------------------------------------------------
** http://www.zimbra.com/forums/administrators/28606-master-incoming-outgoing-archive.html#post134490
      2      5.0.0: Permanent failure: Other/Undefined status: Other undefined status
* Postfix workaround
      2        zcs806.DOMAIN.com
** http://www.postfix.com/ADDRESS_REWRITING_README.html#auto_bcc
      2            Zcs806.DOMAIN.com
* "User defined auto bcc"
      1              subject:test
** http://bugzilla.zimbra.com/show_bug.cgi?id=15306
      1              zimbra
* "Next rev of (mail) identities preferences management (server side)"
** http://bugzilla.zimbra.com/show_bug.cgi?id=17320


====Option 2 - Via ZCS Legal Intercept====
      1  Bounced (remote) ------------------------------------------------------------------------
      1      5.0.0: Permanent failure: Other/Undefined status: Other undefined status
      1        domain.com
      1            user
      1              64.X.X.28      sentry.DOMAIN.com
      1                  505 5.0.0 Unknown recipient: RCPT TO


Generally used for [[Ajcody-User-Management-Topics#Managing_Legal_Requests_for_Information|Managing Legal Requests for Information]]
      9  Filtered --------------------------------------------------------------------------------
 
      7      smtp-amavis:[127.0.0.1]:10026
Description:
      7        Sender address
:: The ZCS legal intercept feature is used to obtain copies of email messages that are sent, received, or saved as drafts from targeted accounts and send these message to a designated “shadow” email address. Legal Intercept can be configured to send the complete content of the message or to send only the header information. When a targeted account sends, receives, or saves a draft message, an intercept message is automatically created to forward copies of the messages as attachments to the specified email address.
      3            admin@zcs806.DOMAIN.com
 
      3              admin@zcs806.DOMAIN.com
Please see:
      2                  10.X.X.36    zcs806.DOMAIN.com
* http://www.zimbra.com/docs/ne/latest/administration_guide/managing_other_zcs_features.8.1.html
      1                  10.X.X.166    gatewayXX.DOMAIN.com
* http://wiki.zimbra.com/index.php?title=Legal_Intercept
      2            zimbra@zcs806.DOMAIN.com
* http://bugzilla.zimbra.com/show_bug.cgi?id=17539
      2              admin@zcs806.DOMAIN.com
      2                  10.X.X.36    zcs806.DOMAIN.com
      1            ajcody@DOMAIN.com
      1              admin@zcs806.DOMAIN.com
      1                  10.X.X.184    edgeXX.DOMAIN.com
      1            san5@zcs806.DOMAIN.com
      1              b@zcs806.DOMAIN.com
      1                 10.X.X.36    zcs806.DOMAIN.com
      2      smtp-amavis:[127.0.0.1]:10024
      2        Sender address
      1            admin@zcs806.DOMAIN.com
      1              admin@zcs806.DOMAIN.com
      1                  10.X.X.166    gatewayXX.DOMAIN.com
      1            ajcody@DOMAIN.com
      1              admin@zcs806.DOMAIN.com
      1                  10.X.X.184    edgeXX.DOMAIN.com


====Option 3 - Zimbra's Archiving And Discovery====
      2  Notifications sent ----------------------------------------------------------------------
      2      Non-delivery
      2        sender


See [[Ajcody-Notes-Archive-Discovery]] concerning A&D setup and options.
      4  Timeouts (inbound) ----------------------------------------------------------------------
      4      After END-OF-MESSAGE


===Limiting Or Increasing Number Of Recipents / Messages===
      1  PIX workaround enabled ------------------------------------------------------------------
      1      disable_esmtp delay_dotcrlf
      1        64.X.X.28      sentry.DOMAIN.com


====Mailing Lists - Distribution Lists====
=== Delivery Delays Percentiles ============================================================
 
                    0%      25%      50%      75%      90%      95%      98%      100%
Please see [[Ajcody-MailingLists-And-Mailman#Problems_Resolving_Virtual_Aliases_For_Members_Of_Large_Distribution_Lists]]
--------------------------------------------------------------------------------------------
Before qmgr      0.01      0.03      0.06      0.14      0.27      0.34      0.48      2.60
In qmgr          0.00      0.00      0.08    117.50    193.00    216.00    231.48    246.00
Conn setup        0.00      0.00      0.00      0.00      0.02      0.04      0.22    20.00
Transmission      0.05      0.09      3.60      9.80    10.00    10.00    11.00    160.00
Total            0.07      0.13      3.80    129.00    203.00    226.00    241.64    259.00
============================================================================================
</pre>


====Policy Daemon====
======zmaccts======


If you want to restrict messages per houryou can look into Policy Daemon:
One way to note accounts that are actively logging in vs. those that aren't, can help shrink the number of accounts you might want to investigate or monitor. [example below, I cut out a lot of the accounts]


* http://wiki.zimbra.com/wiki/Postfix_Policyd
<pre>
* http://wiki.zimbra.com/wiki/How-to_for_cbpolicyd
          account                          status            created      last logon
* http://www.policyd.org/features.html
------------------------------------  -----------    ---------------  ---------------
zcstest001@zcs806.DOMAIN.com               active      01/20/14 18:47  03/02/14 21:11
zcstest002@zcs806.DOMAIN.com               active      01/30/14 01:48  02/19/14 00:07
admin-20140415@zcs806.DOMAIN.com            active      04/15/14 14:42            never
archtest-prod-20140402@zcs806.DOMAIN        active      04/02/14 07:42            never


Beta release in ZCS 7 , see:
          account                          status            created      last logon
------------------------------------  -----------    ---------------  ---------------
bruce@test1.lab                            active      02/22/14 09:32            never
test.cal@test1.lab                          active      04/06/14 05:35  04/06/14 05:35
test200@test1.lab                          active      04/12/14 00:50            never


* "make support for postfix-policyd easier"
                                domain summary
** http://bugzilla.zimbra.com/show_bug.cgi?id=8791


====Postfix====
    domain                  active    closed    locked    maintenance    total
-----------------------  --------  --------  --------  -------------  --------
test1.lab                        3        0        0              0        3
test2.com                        2        0        0              0        2
angad.com                        2        0        0              0        2
test.test                        3        0        0              0        3
test.DOMAIN.com                  6        0        0              0        6
zcs806.DOMAIN.com              58        0        0              0        58
zcs806.DOMAIN.com                2        0        0              0        2
</pre>


Also, there are some default postfix parameters set to control sending a message to x amount recipients.  The parameters you will need to look at are smtpd_recipient_limit & smtpd_recipient_overshoot_limit, these have a default value of 1000.
=====By Authentication Attempts=====


Postfix defines these parameters as:
A fast way to see who is doing a lot of authentications, which normally happens when a spammer has compromised an account with a weak password, is to do:


* smtpd_recipient_limit: The maximum number of recipients that the Postfix SMTP server accepts per message delivery request.
<pre>
* smtpd_recipient_overshoot_limit: The number of recipients that a remote SMTP client can send in excess of the limit specified with $smtpd_recipient_limit, before the Postfix SMTP server increments the per-session error count for each excess recipient.
# cat /var/log/zimbra.log | sed -n 's/.*sasl_username=//p' | sort | uniq -c | sort -n
      1 Auser@domain.com
      3 Buser@domain.com
      4 Cuser@domain.com
      5 Duser@domain.com
    36 SPAMMER@domain.com
</pre>


From the command line you can change the default values.
'''Note - This might take a long time, if so - try pruning it down'''


su - zimbra
Example:
postconf -e smtpd_recipient_limit=<new value>
<pre>
postconf -e smtpd_recipient_overshoot_limit=<new value>
# cat /var/log/zimbra.log | grep sasl_username > /tmp/zimbra_sasl_username.txt
postfix reload
# cat /tmp/zimbra_sasl_username.txt | sed -n 's/.*sasl_username=//p' | sort | uniq -c | sort -n
      1 Auser@domain.com
      3 Buser@domain.com
      4 Cuser@domain.com
      5 Duser@domain.com
    36 SPAMMER@domain.com
</pre>


====Bugs RFE's For Customers To Get Behind====
The full log event will look like this:
<pre>
zimbra1 postfix/smtpd[29431]: B28914D5978: client=xxxxx.server.com[w.x.y.z], sasl_method=LOGIN, sasl_username=user
zimbra1 postfix/cleanup[5522]: B28914D5978: message-id=<20090420154255.B28914D5978@zimbraserver.com>
zimbra1 postfix/qmgr[20690]: B28914D5978: from=<spam@spam.com>, size=6026, nrcpt=10 (queue active)
zimbra1 postfix/cleanup[3983]: 2BA56465D28: message-id=<20090420154255.B28914D5978@zimbraserver.com>
</pre>


I'm wondering if policyd gives one the control everyone is looking for? I've not used it myself.
Against your older logs, you could:


Policyd References:
<pre>
* http://www.policyd.org/tiki-index.php?page=Documentation
# zcat /var/log/zimbra.log* | sed -n 's/.*sasl_username=//p' | sort | uniq -c | sort -n
* http://www.policyd.org/tiki-index.php?page=Quotas&structure=Documentation
</pre>
* http://www.policyd.org/tiki-index.php?page=Accounting&structure=Documentation
 
* http://www.policyd.org/tiki-index.php?page=Policies%20%26%20Groups&structure=Documentation
And you can look at the specific information for the user in question with:
* http://wiki.zimbra.com/index.php?title=Postfix_Policyd
 
<pre>
# grep -C2 "sasl_username=SPAMMER@domain.com" /var/log/zimbra.log
</pre>


There's other additions [add-on's] one can get for policyd.
Or if searching against the older logs:


We have this RFE in regards to policyd support:
<pre>
# zgrep -C2 "sasl_username=SPAMMER@domain.com" /var/log/zimbra.log*
</pre>


* "make support for postfix-policyd easier"
If you want to check on a specific message ID, do:
** http://bugzilla.zimbra.com/show_bug.cgi?id=8791
*** Target Milestone currently for Helix release [ http://pm.zimbra.com ]
Other related rfe/bugs, specially to push variables into admin web console:


* "rate limit amount of mail sent via web client"
<pre>
** http://bugzilla.zimbra.com/show_bug.cgi?id=22300
grep 9DF7520804A /var/log/zimbra.log*
*** *Target Milestone currently for Helix release
</pre>
* "mta "advanced" tab"
** http://bugzilla.zimbra.com/show_bug.cgi?id=14645
*** Target Milestone currently for Helix release
* "Option to IP Blocking through UI"
** http://bugzilla.zimbra.com/show_bug.cgi?id=19240
*** Target Milestone currently for Helix release
* "Mail policies and access control for sending to distribution lists"
** http://bugzilla.zimbra.com/show_bug.cgi?id=9620
*** Target Milestone currently for GunsNRoses


===Controlling SMTPD Client Connections===
For older message logs:


Mmorse did a good write up on these variables in the forum:
<pre>
zgrep 9DF7520804A /var/log/zimbra.log*
</pre>


* http://www.zimbra.com/forums/administrators/13591-solved-limit-max-recipriants.html#post69582
To read/view the message in the queue:


Postfix Resources At Their Site (All Clients/Connections):
  /opt/zimbra/postfix/sbin/postcat -q 9DF7520804A
* [http://www.postfix.org/TUNING_README.html#conn_limit Measures against clients that make too many connections]
* [http://www.postfix.org/anvil.8.html anvil - Postfix session count and request rate control]
* [http://www.postfix.org/postconf.5.html#anvil_rate_time_unit anvil_rate_time_unit - The time unit over which client connection rates and other rates are calculated.]
* [http://www.postfix.org/postconf.5.html#smtpd_client_connection_count_limit smtpd_client_connection_count_limit - How many simultaneous connections any client is allowed to make to this service. ]
* [http://www.postfix.org/postconf.5.html#smtpd_client_message_rate_limit smtpd_client_message_rate_limit - The maximal number of message delivery requests that any client is allowed to make to this service per time unit, regardless of whether or not Postfix actually accepts those messages.]
* [http://www.postfix.org/postconf.5.html#smtpd_client_recipient_rate_limit smtpd_client_recipient_rate_limit - The maximal number of recipient addresses that any client is allowed to send to this service per time unit, regardless of whether or not Postfix actually accepts those recipients.]
* [http://www.postfix.org/postconf.5.html#smtpd_client_connection_rate_limit smtpd_client_connection_rate_limit - The maximal number of connection attempts any client is allowed to make to this service per time unit.]


Postfix Resources At Their Site (Exceptions To Clients/Connections Or Single Source):
One would then normally lock/change password on the one account showing the most activity. Grep'ing the /var/log/zimbra.log with the username in question will also show the ip address being used, this can be blocked with your firewall.
* [http://www.postfix.org/postconf.5.html#smtpd_client_event_limit_exceptions smtpd_client_event_limit_exceptions - Clients that are excluded from connection count, connection rate, or SMTP request rate restrictions.]


===Restrictions===
To be alerted of a compromised account and have it lock automatically see below. Slightly modified from this reference : http://www.zimbra.com/forums/administrators/62613-identify-compromised-accounts.html#post278732 :


Besides using external mailing list software, [[Ajcody-MailingLists-And-Mailman#Mailman_-_Mailing_List_Manager|Mailman]] or [[Ajcody-MailingLists-And-Mailman#Sympa_-_Mailing_List_Manager|Sympa]], here's some other topical items in regards to restrictions.
<pre>


Some user contributed articles:
#!/bin/bash
# checks log file and gets a count of authentications sent per minute, per user
# and if the count exceeds the maxmails value the user's account is locked.


* [[RestrictPostfixRecipients]]
logfile="/var/log/zimbra.log"
* [[Restrict_sending_to_certain_domains]]
maxmails="10"
* [[Restrict_users_to_certain_domain]]
mydomain="example.com"
* [http://www.zimbra.com/forums/administrators/15041-guide-postifx-how-multiple-access-lists-protected-distribution-lists.html Forum Post: GUIDE: Postifx: HOW TO: Multiple access lists for protected Distribution-lists]
support="<postmaster-userid>@$mydomain"
accounts="/tmp/active_accounts"


Some Postfix references:
su zimbra -c "/opt/zimbra/bin/zmaccts" | grep "@" | grep active | awk '{print $1}' > $accounts


* http://www.postfix.org/RESTRICTION_CLASS_README.html#internal
zgrep -i "auth ok" $logfile | sed 's/ / /g' | awk -F"[ :]" '{print $3":"$4,$11;}' | uniq -c | sort -n | \
* http://www.postfix.org/SMTPD_POLICY_README.html
while read line
do
    count=`echo ${line} | cut -d' ' -f 1`
    userid=`echo ${line} | cut -d' ' -f 3`
    timestamp=`echo ${line} | cut -d' ' -f 2`
    active=`grep "$userid@$mydomain" $accounts`


Some RFE's related to mta based restrictions [targets are based upon today - July 21, 2010]:
    if [ "$count" -gt "$maxmails" ] && [ "$active" == "$userid@$mydomain" ]; then
        echo "Maximum email rate exceeded, $userid@$mydomain will be locked"
        su zimbra -c "/opt/zimbra/bin/zmprov ma $userid@$mydomain zimbraAccountStatus locked"
        subject="$userid account locked due to excessive connections"
        # Email text/message
        message="/tmp/emailmessage.txt"
        echo "$userid account has been locked as there were $count connections made at"> $message
        echo "$timestamp.  Please have the user change their password, and check for phishing" >>$message
        echo "emails if possible." >>$message
        # send an email using /bin/mail
        /usr/bin/mail -s "$subject" "$support" < $message
        rm -f $message
 
        #update list of active accounts
        su zimbra -c "/opt/zimbra/bin/zmaccts" | grep "@" | grep active | awk '{print $1}' > $accounts
    fi
done
 
rm -f $accounts
 
</pre>


* "Dynamic distribution lists - Internal Directory"
Then run it as a cron job. The frequency will depend on the number of accounts you're managing.
** http://bugzilla.zimbra.com/show_bug.cgi?id=3884
 
* "per-domain send restriction" - Not Committed
<pre>
** http://bugzilla.zimbra.com/show_bug.cgi?id=5595
* * * * * /opt/zimbra/find_spammer.sh
*** These are marked as dup's of the above:
</pre>
**** "disable outbound e-mail for one user"
 
***** http://bugzilla.zimbra.com/show_bug.cgi?id=34654
=====By Connecting IP - Useful For Blocking IP At Firewall=====
**** "Add an facility to detemine internal relay users in admin"
 
***** http://bugzilla.zimbra.com/show_bug.cgi?id=33255
See also the following:
* "policy for who can send to a distribution lists" - Helix
 
** http://bugzilla.zimbra.com/show_bug.cgi?id=9620
* http://wiki.zimbra.com/wiki/Log_Files#Logging_the_Originating_IP
*** RFE 9620 is also a blocker for the following RFE:
 
**** "milter to check if sender can send to a distribution list"
To find the originating IP address of where the emails are coming from:
***** http://bugzilla.zimbra.com/show_bug.cgi?id=46311
 
*** These are marked as dup's of the above:
  grep 'connect from' /var/log/zimbra.log | sed 's/.*connect from.*\[\(.[^]]*\)\]/\1/g' | sort | uniq -c | sort -nr | head
**** "Ability to Specify Mail Policy"
 
***** http://bugzilla.zimbra.com/show_bug.cgi?id=5555
To check your older logs [example output below]:
**** "domain level filters rules"
***** http://bugzilla.zimbra.com/show_bug.cgi?id=6128
**** "Distribution List Restrictions"
***** http://bugzilla.zimbra.com/show_bug.cgi?id=7104
**** "Feature request - Mail Policies"
***** http://bugzilla.zimbra.com/show_bug.cgi?id=9328
**** "limit "send from"  to certain domains"
***** http://bugzilla.zimbra.com/show_bug.cgi?id=12038
**** "'Internal email only' options in admin control panel"
***** http://bugzilla.zimbra.com/show_bug.cgi?id=16671
**** "Access control for free busy and resources (ie permission to invite)"
***** http://bugzilla.zimbra.com/show_bug.cgi?id=22913
**** "RFE: Admin GUI: Restrict the use of Distribution List among users."
***** http://bugzilla.zimbra.com/show_bug.cgi?id=29305
* "Implement smtpd_sender_restrictions"
** http://bugzilla.zimbra.com/show_bug.cgi?id=15808
* "How to restrict a user to only send via zwc"
** http://bugzilla.zimbra.com/show_bug.cgi?id=16623
* "enable configuration of  "smtpd_sender_restriction""
** http://bugzilla.zimbra.com/show_bug.cgi?id=22363


===Spam Control And Related Issues===
<pre>
zgrep 'connect from' /var/log/zimbra.log* | sed 's/.*connect from.*\[\(.[^]]*\)\]/\1/g' | sort | uniq -c | sort -nr | head
    36 10.137.xx.34
    34 127.0.0.1
</pre>


====High Over View Steps Of What To Do====
=====Open Relay Check=====


* '''Step 1:''' Confirm your not an open relay and double check your postfix $mynetworks variable.
You should also confirm you aren't an open relay.
** [[ZimbraMtaMyNetworks|ZimbraMtaMyNetworks And Postfix mynetworks]]
** [[Ajcody-MTA-Postfix-Topics#Open_Relay_Check|Open Relay Check]]
* '''Step 2:''' Stop or put on-hold mail queue.
** Put all messages into HOLD queue:
*** Get a report of your current mailq [can be useful if you clean out the queue later but need to identify what external mail hosts are now denying you and who you'll need to contact about getting removed from their denial list]
**** Example: /opt/zimbra/postfix/sbin/mailq > /tmp/zimbra_mailq_report.txt
*** /opt/zimbra/postfix/sbin/postsuper -h ALL
** Or put all messages match compromised account into HOLD queue:
*** /opt/zimbra/postfix/sbin/mailq | grep user_compromised@domain | awk '{ print $1 }' | tr -d '!*' | /opt/zimbra/postfix/sbin/postsuper -h -
**** Note, this is an example - you might with the grep grab more than the compromised account with the match.
** See whole section - [[Ajcody-MTA-Postfix-Topics#Managing_Postfix_Queue| Managing The Postfix Queue]]
* '''Step 3:''' Check your mail log [On ZCS servers running MTA services] - /var/log/zimbra.log
** [[Ajcody-MTA-Postfix-Topics#Understanding_.2Fvar.2Flog.2Fzimbra.log_And_Postfix_Log_Events| Understanding the zimbra.log file and Postfix log events.]] , see subsection about queue ID and message ID also.
** [[Ajcody-MTA-Postfix-Topics#Who.27s_My_Spammer.3F| Who's My Spammer?]]
* '''Step 4:''' Identify compromised account authenticating SMTP AUTH connection or block ip address where emails are coming from at firewall.
** [[Ajcody-MTA-Postfix-Topics#Who.27s_My_Spammer.3F| Who's My Spammer?]]
** Continue to monitor compromised account and block ip addresses:
*** tail -f /var/log/zimbra.log | grep username | grep sasl
**** Jun  8 18:14:10 mail postfix/smtpd[15794]: 004358EEB16: client=unknown[XXXX.236.197.216], sasl_method=LOGIN, sasl_username=username@domain
* '''Step 5:''' Disable the exploited email account, expire auth session, etc.
** [[Ajcody-User-Management-Topics#Resetting_A_User.27s_Account_From_CLI| Resetting Or Expiring User Auth]]
* '''Step 6:''' Move the mail queue or delete the spam email
** See whole section - [[Ajcody-MTA-Postfix-Topics#Managing_Postfix_Queue| Managing The Postfix Queue]]
* '''Step 7:''' Release Mail queue


====Who's My Spammer?====
<pre>
$ host -t mx DOMAIN.com
DOMAIN.com mail is handled by 10 mail.DOMAIN.com.


=====Getting Some Initial Summary Data=====
$ telnet mail.DOMAIN.com 25
Trying 184.###.##.## ...
Connected to mail.DOMAIN.com.
Escape character is '^]'.
220 mail.DOMAIN.com ESMTP Postfix
helo support.test
250 mail.DOMAIN.com
mail from:<SPAMMER@domain.com>
250 2.1.0 Ok
rcpt to:<TEST@DOMAIN.COM>
554 5.7.1 <TEST@DOMAIN.COM>: Relay access denied


======zmdialyreport======
rcpt to:<SPAMMER@domain.com>
554 5.7.1 Service unavailable; Client host [71.XXX.XX.XX] blocked
using zen.spamhaus.org; http://www.spamhaus.org/query/bl?ip=71.202.XX.XX
quit
221 2.0.0 Bye
Connection closed by foreign host.
</pre>
 
=====Telnet Test To Confirm/Show Authentication Required For SMTP/Port 25=====


You can first get some summary data by doing the following:
This is an example:


<pre>
<pre>
[zimbra@zcs806 ~]$ /opt/zimbra/libexec/zmdailyreport
esx2:~ ajcody$ telnet zcs723.EXAMPLE.com 25


Grand Totals
Trying 10.137.27.32...
------------
Connected to zcs723.EXAMPLE.com.
messages
Escape character is '^]'.
220 zcs723.EXAMPLE.com ESMTP Postfix
helo zcs723.EXAMPLE.com  << I typed
250 zcs723.EXAMPLE.com
mail from:ajcody@zcs723.EXAMPLE.com  << I typed
250 2.1.0 Ok
rcpt to:ajcody2@zcs723.EXAMPLE.com  << I typed
553 5.7.1 <ajcody@zcs723.EXAMPLE.com>: Sender address rejected: not logged in
</pre>


      7  received
But note - if you do this from the ZCS server or a server that is within the ip range or has it's specific ip listed in the mynetworks, you will not get this authentication requirement.
    11  delivered
      0  forwarded
      0  deferred
      0  bounced
      3  rejected (21%)
      0  reject warnings
      0  held
      0  discarded (0%)


  2780  bytes received
<pre>
  10914  bytes delivered
[root@zcs723 ~]# telnet localhost 25
      2  senders
Trying ::1...
      1   sending hosts/domains
telnet: connect to address ::1: Connection refused
      1   recipients
Trying 127.0.0.1...
      1  recipient hosts/domains
Connected to localhost.
 
Escape character is '^]'.
 
220 zcs723.EXAMPLE.com ESMTP Postfix
Per-Hour Traffic Summary
helo myworkstation
    time          received  delivered  deferred    bounced    rejected
250 zcs723.EXAMPLE.com
    --------------------------------------------------------------------
ehlo myworkstation
    0000-0100          0          0          0          0          0
250-zcs723.EXAMPLE.com
    0100-0200          1          3          0          0          0
250-PIPELINING
    0200-0300          0          0          0          0          0
250-SIZE 10240000
    0300-0400          0          0          0          0          0
250-VRFY
    0400-0500          0          0          0          0          0
250-ETRN
    0500-0600          0          0          0          0          0
250-STARTTLS
    0600-0700          0          0          0          0          0
250-AUTH LOGIN PLAIN
    0700-0800          1         0          0          0         2
250-AUTH=LOGIN PLAIN
    0800-0900          1          0          0          0          0
250-ENHANCEDSTATUSCODES
    0900-1000          0          0          0          0          1
250-8BITMIME
    1000-1100          0          0          0          0          0
250 DSN
    1100-1200          0          0          0          0          0
mail from:<ajcody@zcs723.EXAMPLE.com>
    1200-1300          4          8          0          0          0
250 2.1.0 Ok
    1300-1400          0          0          0          0          0
rcpt to: <ajcody2@zcs723.EXAMPLE.com>
    1400-1500          0          0          0          0          0
250 2.1.5 Ok
    1500-1600          0          0          0          0          0
data
    1600-1700          0          0          0          0          0
354 End data with <CR><LF>.<CR><LF>
    1700-1800          0          0          0          0          0
From: Adam <ajcody@zcs723.EXAMPLE.com>
    1800-1900          0         0          0          0          0
To: Adam 2 <ajcody2@zcs723.EXAMPLE.com>
    1900-2000          0          0          0          0          0
Subject: From Localhost - NOT Auth
    2000-2100          0         0          0          0          0
test
    2100-2200          0          0          0          0          0
.
    2200-2300          0          0          0          0          0
250 2.0.0 Ok: queued as 8B19E1E78D1
    2300-2400          0          0          0          0          0
quit
221 2.0.0 Bye
Connection closed by foreign host.
</pre>


Host/Domain Summary: Message Delivery (top 50)
====Resources====
sent cnt  bytes  defers  avg dly max dly host/domain
-------- -------  -------  ------- ------- -----------
    11    10914        0    7.4 s  24.0 s  zcs806.DOMAIN.com


Host/Domain Summary: Messages Received (top 50)
A list of resources you'll find useful:
msg cnt  bytes  host/domain
-------- -------  -----------
      5    2780  zcs806.DOMAIN.com


top 50 Senders by message count
* [[Zimbra_MTA#Anti-Spam_Training_Filters]]
-------------------------------
* [[CLI_zmtrainsa]]
      4  zimbra@zcs806.DOMAIN.com
* [[Improving_Anti-spam_system]]
      1  admin@zcs806.DOMAIN.com
* [[Postfix_Policyd]]
 
* [[IP_Address_whitelisting]]
top 50 Recipients by message count
* [[Spam_training]]
----------------------------------
*  Restrict by user
    11  admin@zcs806.DOMAIN.com
** [[RestrictPostfixRecipients]]
* Restrict by ip addresses and sender and other items:
** [http://www.postfix.org/RESTRICTION_CLASS_README.html Postfix - Restriction Class Readme]
*** Note, from the readme:
**** "What follows is based on the SMTP client IP address, and therefore is subject to IP spoofing."
**** "What follows is based on the sender SMTP envelope address, and therefore is subject to SMTP sender spoofing."


top 50 Senders by message size
Wiki articles that have been assigned to the anit-spam category:
------------------------------
  1974  zimbra@zcs806.DOMAIN.com
    806  admin@zcs806.DOMAIN.com


top 50 Recipients by message size
* [http://wiki.zimbra.com/index.php?title=Category:Anti-spam Category:Anti-spam]
---------------------------------
  10914  admin@zcs806.DOMAIN.com


message deferral detail: none
Down to the end-user:


message bounce detail (by relay): none
* [[Cool_User_Spam_Filters]]
* [http://www.zimbra.com/community/end_user_guide_and_how_to.html End-User Guide And How-To]


message reject detail
=====External Relay Test Pages=====
---------------------
  MAIL
    5.3.4 Message size exceeds fixed limit (total: 3)
          3  domain-ext.com


message reject warning detail: none
* http://www.checkor.com/
** Note - this test is in regards to the From spoofing spammers sometimes do for DL's.
** Also, for the test - make an account/DL on your system for test1@[your domain] . Otherwise you'll just error about account not existing.
<pre>
RSET
250 2.0.0 Ok
MAIL FROM: spam@mail59.DOMAIN.com
250 2.1.0 Ok
RCPT TO: test1@mail59.DOMAIN.com
Test Failed, 250 2.1.5 Ok
</pre>


message hold detail: none
* http://www.mailradar.com/openrelay/


message discard detail: none
====Blocking MAIL FROM - smtpd_sender_restrictions - Default Is Empty====


smtp delivery failures: none
=====External References=====


Warnings
* External Sources
--------
** Postfix
  sendmail (total: 3)
*** [http://www.postfix.org/postconf.5.html#smtpd_sender_restrictions Postfix On smtpd_sender_restrictions]
        1  or the command is run from a set-uid root process
** Milter
        1  the Postfix sendmail command has set-uid root file permissions
*** [http://www.postfix.org/MILTER_README.html#limitations Postfix's Milter Readme - Limitations]
        1  the Postfix sendmail command must be installed without set-uid ...
**** [http://puszcza.gnu.org.ua/software/mailfromd/ Mailfromd]
  smtpd (total: 1)
***** [http://puszcza.gnu.org.ua/software/mailfromd/manual/html_section/SAV.html#SEC7 Mailfromd - Sender Address Verification]
        1  7A735345A: queue file size limit exceeded
** [http://www.symantec.com/connect/articles/anti-spam-solutions-and-security Anti-Spam Solutions and Security]


Fatal Errors: none
=====Zimbra References And Bugs & RFE's=====


Panics: none
* Zimbra Related Soures
** "policy for who can send to a distribution lists"
*** https://bugzilla.zimbra.com/show_bug.cgi?id=9620
**** '''Note - This will not stop spammers from mailing into your DL's by way of forged Mail From and guessing your DL address in the To'''
** "support smtpd_sender_login_maps for smtp auth"
*** http://bugzilla.zimbra.com/show_bug.cgi?id=11258
** "Implement smtpd_sender_restrictions"
*** http://bugzilla.zimbra.com/show_bug.cgi?id=15808
** "milter to check if sender can send to a distribution list"
*** https://bugzilla.zimbra.com/show_bug.cgi?id=46311
**** Dependent upon bug 9620
** Zimbra Forum Post on using smtpd_sender_restrictions options
*** [http://www.zimbra.com/forums/administrators/28770-how-enforce-sasl_username-address.html  How to enforce sasl_username=FROM ADDRESS"
** Another Zimbra Forum Post on using smtpd_sender_restrictions options
*** [http://www.zimbra.com/forums/administrators/39095-need-urgent-help-spamming-issue.html Need urgent help on spamming issue]


Master daemon messages: none
=====Protecting DL's From Spammers - Forging Mail From=====
</pre>


======client_usage_report.py======
======First Recommendation - As Given By Dev's From Critical Meeting Notes======


This will give some stats on your mail activity. Note, there are some issue with this script double reporting mail counts etc, but it's useful to identify the top 50 for activity.
----


<pre>
* Enabled SASL/SMTP Authentication
[zimbra@zcs806 ~]$ /opt/zimbra/libexec/client_usage_report.py
** Ref: http://wiki.zimbra.com/index.php?title=SMTP_Auth_Problems
Reading /opt/zimbra/log/access_log.2014-04-17 ..
* Implement how-to as described in :
Reading /opt/zimbra/log/access_log.2014-04-18 ..
** Permitted Senders: [[RestrictPostfixRecipients]]
Reading /opt/zimbra/log/access_log.2014-04-19 ..
*** '''Note: You'll see on the above page a reference to the spoof hole.'''
Reading /opt/zimbra/log/access_log.2014-04-20 ..
**** '''''"This method can be spoofed by forging the MAIL FROM: header (so mail appears to originate from within the domain), so it isn't foolproof, but it works for basic needs."'''''
Reading /opt/zimbra/log/access_log.2014-04-21 ..
*** '''Note: You'll also modify the instructions as above with addition details provided below.'''
Reading /opt/zimbra/log/access_log.2014-04-22 ..
* Force authentication for local-domain senders:
Reading /opt/zimbra/log/access_log.2014-04-23 ..
** modify the main.cf to have the following:
Writing /opt/zimbra/zmstat/client_usage_report_2014-04-24.csv ..
*** smtpd_sender_restrictions = check_sender_access hash:/path/to/file
</pre>
** Then for the /path/to/file that you used in the mail.cf for smtpd_sender_restrictions, you'll have a line like:
*** example.com            permit_sasl_authenticated, reject
 
======Second Recommendation - Unpredictable DL name or Non-routing Domain======


Then review the file it will create , it will give :  "user_agent","client_IP","req_count"
----


<pre>
Do not use predictable DL names. Instead of using everyone@company.com , use something like everyone-[random-string]@company.com .
[zimbra@zcs806 ~]$ cat /opt/zimbra/zmstat/client_usage_report_2014-04-24.csv
"user_agent","client_IP","req_count"
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:28.0) Gecko/20100101 Firefox/28.0","192.168.1.166","14"
"Mozilla/5.0 (Windows NT 6.2; WOW64; rv:28.0) Gecko/20100101 Firefox/28.0","192.168.1.166","93"
"Mozilla/5.0 (Windows NT 6.1; WOW64; rv:28.0) Gecko/20100101 Firefox/28.0","192.168.1.174","6"
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:28.0) Gecko/20100101 Firefox/28.0","192.168.1.166","71"
</pre>


======qshape======
Another option is to use a non-routing domain - company.local - and setup your DL's there. You'll want to configure your main domain to be able to query the GAL of this domain.


You can also look at the results of [[http://www.postfix.org/qshape.1.html qshape]] - the default is the active queue. For more on qshape, see [[http://www.postfix.org/QSHAPE_README.html Postfix Qshape Readme]] .
To see the existing setting:


<pre>
  zmprov gd [domainname] zimbraGalLdapSearchBase
qshape deferred
              T 5 10 20 40 80 160 320 640 1280 1280+
        TOTAL 12  0  0  0  0  0  0  0  0    0    12
    gmail.com  9  0  0  0  0  0  0  0  0    0    9
    yahoo.com  3  0  0  0  0  0  0  0  0    0    3
</pre>


======3rd Party Log Reports - postfix-logwatch and amavis-logwatch======
To change the variable for the domain:


Created RFE for us to include these in ZCS:
zmprov md [domainname] zimbraGalInternalSearchBase ROOT


* Include postfix-logwatch_and_amavis-logwatch
======Third Recommendation - Using smtpd_sender_restrictions======
** https://bugzilla.zimbra.com/show_bug.cgi?id=89450


You can download them from http://logreporters.sourceforge.net/ . It's a fairly simply install, download and then extract - cd into extracted directory and as root type :
----


make install-standalone
:::'''Work In Progress. I'm testing this now. Please don't attempt until this line is removed.'''


They will install to /usr/local/bin/amavis-logwatch & postfix-logwatch . The config files are in /usr/local/etc/amavis-logwatch.conf & postfix-logwatch.conf . Here's an example of the output.
Update: See the following:
* "Enforcing a match between the FROM Address and sasl_username in Zimbra Collaboration Server (2011281)"
** http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2011281
 
This should work if your "clients" are using ZWC, ZCO, or ActiveSync mobile devices. If you are using IMAP/POP + STMP thick clients, you'll most likely have to enable smtp authentication [sasl] and use the reject_authenticated_sender_login_mismatch variable instead.


/usr/local/bin/amavis-logwatch output example:
postconf -e smtpd_sender_restrictions=reject_sender_login_mismatch
postfix reload


<pre>
This option is described as: 
[root@zcs806 amavis-logwatch-1.51.02]# /usr/local/bin/amavis-logwatch /var/log/zimbra.log
****** Summary *************************************************************************************


      4  Total messages scanned ------------------ 100.00%
:'''''reject_sender_login_mismatch'''''
  1.926K  Total bytes scanned                          1,972
:: ''Reject the request when $smtpd_sender_login_maps  specifies an owner for the MAIL FROM address, but the client is not (SASL) logged in as that MAIL FROM address owner; or when the client is (SASL) logged in, but the client login name doesn't own the MAIL FROM address according to $smtpd_sender_login_maps.'' [http://www.postfix.org/postconf.5.html#smtpd_sender_restrictions Man page]
========  ==================================================


      4  Passed ----------------------------------  100.00%
====Some Other SMTP Sending Restrictions====
      4    Clean passed                            100.00%
========  ==================================================


      4  Ham -------------------------------------  100.00%
=====Blocking Incoming From Domain And By User=====
      4    Clean passed                            100.00%
========  ==================================================


See the following:


==================================================================================
* [[Domain_level_blocking_of_users]]
Spam Score Percentiles        0%      50%      90%      95%      98%      100%
* [[Improving_Anti-spam_system#Implementing_Whitelist.2FBlacklist]]
----------------------------------------------------------------------------------
 
Score Ham (4)            -1.900    -1.900    -1.900    -1.900    -1.900    -1.900
=====check_client_access=====
==================================================================================


======================================================================================================
The smtpd_client_restrictions parameter restricts what clients this system accepts SMTP connections from. The default behavior is to allow SMTP connections from any client. This is discussed under [http://www.postfix.org/spam.html Spam Controls] on the Postfix site.
Spam Score Frequency      <= -10    <= -5      <= 0      <= 5    <= 10    <= 20    <= 30      > 30
------------------------------------------------------------------------------------------------------
Hits (4)                      0        0        4        0        0        0        0        0
Percent of Hits            0.00%    0.00%  100.00%    0.00%    0.00%    0.00%    0.00%    0.00%
======================================================================================================
</pre>


/usr/local/bin/postfix-logwatch output example:
Example:


<pre>
check_client_access regexp:/etc/postfix/access_sender_client_server,
[root@zcs806 amavis-logwatch-1.51.02]# /usr/local/bin/postfix-logwatch /var/log/zimbra.log


****** Summary *************************************************************************************
Example:


      1  *Warning: Queue file size limit exceeded
check_sender_access regexp:/etc/postfix/access_sender_toplevel


  6.512K  Bytes accepted                              6,668
=====smtpd_reject_unlisted_sender=====
  1.928K  Bytes sent via SMTP                          1,974
  4.584K  Bytes sent via LMTP                          4,694
========  ==================================================


      10  Accepted                                    76.92%
Details can be found on the [http://www.postfix.org/postconf.5.html#smtpd_reject_unlisted_recipient mail.cf] Postfix page.
      3  Rejected                                    23.08%
--------  --------------------------------------------------
      13  Total                                      100.00%
========  ==================================================


      3  5xx Reject message size                    100.00%
Example:
--------  --------------------------------------------------
      3  Total 5xx Rejects                          100.00%
========  ==================================================


      10  Connections
smtpd_reject_unlisted_sender = yes
      10  Disconnections
      8  Removed from queue
      4  Sent via SMTP
      4  Sent via LMTP
      4  Filtered


****** Detail (10) *********************************************************************************
Possible Bug:
http://bugzilla.zimbra.com/show_bug.cgi?id=24889


      3  5xx Reject message size -----------------------------------------------------------------
====What's Your SPF Records Say, When Getting "does not designate 74.x.x.x as permitted sender Errors"====
      3      192.168.1.166    remote.domain.com
      3        *unavailable
      3            *unavailable


      4  Sent via SMTP ---------------------------------------------------------------------------
This is most likely related to the SPF records for your domain and what the header content of the sending email states as it's Mail From. For example, this is from the header of an email that was "received":
      4      zcs806.DOMAIN.com


      4  Sent via LMTP ---------------------------------------------------------------------------
<pre>
      4      zcs806.DOMAIN.com
Received: from mail.XYZ-FAKE.com (mailhost.XYZ-FAKE.com [74.X.X.244]) by mta01.ABC-FAKE.com with ESMTP id
Cft0mO3fjlFGQjTA for <support@ABC-FAKE.com>; Tue, 21 Apr 2009 05:14:13 -0700 (PDT)
X-Barracuda-Envelope-From: testuser@XYZ-FAKE.com
Received-SPF: pass (mta01.ABC-FAKE.com: domain of testuser@XYZ-FAKE.com designates 74.X.X.244 as permitted sender)
receiver=mta01.ABC-FAKE.com; client_ip=74.X.X.244; envelope-from=testuser@XYZ-FAKE.com;
</pre>


      4  Filtered --------------------------------------------------------------------------------
To see what this check was done against, do the following below. I'll trim the output and adjust the information used to protect the innocent. Also, notice how a DNS "alias" might cause an issue here? :
      2      smtp-amavis:[127.0.0.1]:10024
      2        Sender address
      1            admin@zcs806.DOMAIN.com
      1              admin@zcs806.DOMAIN.com
      1                  192.168.1.166    remote.domain.com
      1            user@DOMAIN.com
      1              admin@zcs806.DOMAIN.com
      1                  192.168.1.184    remote2.domain.com
      2      smtp-amavis:[127.0.0.1]:10026
      2        Sender address
      1            admin@zcs806.DOMAIN.com
      1              admin@zcs806.DOMAIN.com
      1                  192.168.1.166    remote.domain.com
      1            user@DOMAIN.com
      1              admin@zcs806.DOMAIN.com
      1                  192.168.1.184    remote2.domain.com


=== Delivery Delays Percentiles ============================================================
<pre>
                    0%      25%      50%      75%      90%      95%      98%      100%
--------------------------------------------------------------------------------------------
Before qmgr      0.04      0.09      0.11      0.11      0.23      0.35      0.43      0.48
In qmgr          0.00      0.00      0.01      0.01      0.04      0.07      0.08      0.09
Conn setup        0.00      0.01      0.29      1.30      2.05      2.23      2.33      2.40
Transmission      0.10      2.81      4.85      9.60    21.00    21.00    21.00    21.00
Total            0.20      2.91      5.20    11.00    23.30    23.65    23.86    24.00
============================================================================================
</pre>


'''Note''' - First, look at the options each command has using the -h output. You might want to use --full when doing an investigation and also include a wildcard - /var/log/zimbra.lo* to take in all the log data. For example:
$ host 74.X.X.244
244.X.X.74.in-addr.arpa domain name pointer mailhost.XYZ-FAKE.com.


<pre>
$ host mailhost.XYZ-FAKE.com
[zimbra@zcs806 ~]$ /usr/local/bin/postfix-logwatch --full /var/log/zimbra.lo*
mailhost.XYZ-FAKE.com has address 74.X.X.244
****** Summary *************************************************************************************


      9  *Fatal:  General fatal
$ host mail.XYZ-FAKE.com
      1  *Warning: Queue file size limit exceeded
mail.XYZ-FAKE.com is an alias for mailhost.XYZ-FAKE.com.
      21  Miscellaneous warnings
mailhost.XYZ-FAKE.com has address 74.X.X.244


710.888K  Bytes accepted                            727,949
$ dig XYZ-FAKE.com MX
193.036K  Bytes sent via SMTP                        197,669
520.114K  Bytes sent via LMTP                        532,597
========  ==================================================


    1041  Accepted                                    99.71%
;; QUESTION SECTION:
      3  Rejected                                    0.29%
;XYZ-FAKE.com. IN MX
--------  --------------------------------------------------
    1044  Total                                      100.00%
========  ==================================================


      3  5xx Reject message size                    100.00%
;; ANSWER SECTION:
--------  --------------------------------------------------
XYZ-FAKE.com. 3600 IN MX 22 serverA.DNS-FAKE.com.
      3  Total 5xx Rejects                          100.00%
XYZ-FAKE.com. 3600 IN MX 11 serverB.DNS-FAKE.com.
========  ==================================================


      65  Connections
$ dig XYZ-FAKE.com TXT
      65  Disconnections
    1041  Removed from queue
    523  Sent via SMTP
    517  Sent via LMTP
      2  Bounced (local)
      1  Bounced (remote)
      9  Filtered
      2  Notifications sent


      4  Timeouts (inbound)
;; QUESTION SECTION:
      1  PIX workaround enabled
;XYZ-FAKE.com. IN TXT


****** Detail (10) *********************************************************************************
;; ANSWER SECTION:
XYZ-FAKE.com. 3600 IN TXT "v=spf1 a:mail.XYZ-FAKE.com ~all"


      9  *Fatal:  General fatal -----------------------------------------------------------------
</pre>
      3      Queue report unavailable - mail system is down
      3      Usage: sendmail [options]
      2      The Postfix mail system is not running
      1      Usage: send-mail [options]


      21  Miscellaneous warnings ------------------------------------------------------------------
See the following for more information:
      7      or the command is run from a set-uid root process
      7      the Postfix sendmail command has set-uid root file permissions
      7      the Postfix sendmail command must be installed without set-uid root file permissions


      3  5xx Reject message size -----------------------------------------------------------------
* http://www.openspf.org/
      3     10.X.X.166    fence.DOMAIN.com
* http://www.schlitt.net/spf/spf_classic/draft-schlitt-spf-classic-02.html#publishing
      3        *unavailable
** All of the 3.x section.
      3            *unavailable


    523  Sent via SMTP ---------------------------------------------------------------------------
===Using Different SMTP Server For Webclient (ZWC), Mobiles, And ZCO===
    507      86.lab
      15      zcs806.DOMAIN.com
      1      domaina.com


    517  Sent via LMTP ---------------------------------------------------------------------------
====Note Of Caution About Using External MTAs====
    507      86.lab
      10      zcs806.DOMAIN.com


      2  Bounced (local) -------------------------------------------------------------------------
Using non-zimbra MTA's can cause some options in zimbra to not function anymore - since it no longer has zimbra's mta services available.
      2      5.0.0: Permanent failure: Other/Undefined status: Other undefined status
 
      2        zcs806.DOMAIN.com
=====Zimbra Mail Forwarding Possibly Will Not Work - Turn Off User Option To Set MailForwarding=====
      2            Zcs806.DOMAIN.com
 
      1              subject:test
Mail forwarding might no longer work depending on the configuration you setup regarding the use of your external mta's. When this happens you'll most likely want to disable the option for users to set a mail forwarding address in their preferences. This can be done via their COS or USER configuration.
      1              zimbra
 
* In the admin console, goto the COS configuration the user/s are using and the "Features" tab. Uncheck the option "Allow the user to specify a forwarding address" under Mail Features. It is in the same location under a USERs configuration panel in the admin console.


      1  Bounced (remote) ------------------------------------------------------------------------
In the CLI, you will see these set as the defaults for the default COS. The admin gui option above only adjusts the zimbraFeatureMailForwardingEnabled variable :
      1      5.0.0: Permanent failure: Other/Undefined status: Other undefined status
      1        domain.com
      1            user
      1              64.X.X.28      sentry.DOMAIN.com
      1                  505 5.0.0 Unknown recipient: RCPT TO


      9  Filtered --------------------------------------------------------------------------------
$ zmprov gc default | grep zimbraFeatureMailForwarding
      7     smtp-amavis:[127.0.0.1]:10026
     zimbraFeatureMailForwardingEnabled: TRUE
      7        Sender address
     zimbraFeatureMailForwardingInFiltersEnabled: TRUE
      3            admin@zcs806.DOMAIN.com
      3              admin@zcs806.DOMAIN.com
      2                  10.X.X.36    zcs806.DOMAIN.com
      1                  10.X.X.166    gatewayXX.DOMAIN.com
      2            zimbra@zcs806.DOMAIN.com
      2              admin@zcs806.DOMAIN.com
      2                  10.X.X.36    zcs806.DOMAIN.com
      1            ajcody@DOMAIN.com
      1              admin@zcs806.DOMAIN.com
      1                  10.X.X.184    edgeXX.DOMAIN.com
      1            san5@zcs806.DOMAIN.com
      1              b@zcs806.DOMAIN.com
      1                  10.X.X.36    zcs806.DOMAIN.com
      2     smtp-amavis:[127.0.0.1]:10024
      2        Sender address
      1            admin@zcs806.DOMAIN.com
      1              admin@zcs806.DOMAIN.com
      1                  10.X.X.166    gatewayXX.DOMAIN.com
      1            ajcody@DOMAIN.com
      1              admin@zcs806.DOMAIN.com
      1                  10.X.X.184    edgeXX.DOMAIN.com


      2  Notifications sent ----------------------------------------------------------------------
$ zmprov ga ajcody@`zmhostname` | grep zimbraFeatureMailForwarding
      2     Non-delivery
     zimbraFeatureMailForwardingEnabled: TRUE
      2        sender
    zimbraFeatureMailForwardingInFiltersEnabled: TRUE


      4  Timeouts (inbound) ----------------------------------------------------------------------
More details about them are in the /opt/zimbra/conf/attrs/zimbra-attrs.xml file.
      4      After END-OF-MESSAGE


      1   PIX workaround enabled ------------------------------------------------------------------
<pre>
      1      disable_esmtp delay_dotcrlf
<attr id="342" name="zimbraFeatureMailForwardingEnabled" type="boolean" cardinality="single"
      1        64.X.X.28      sentry.DOMAIN.com
optionalIn="account,cos" flags="accountInfo,accountInherited,domainAdminModifiable">
   <defaultCOSValue>TRUE</defaultCOSValue>
  <desc>enable end-user mail forwarding features</desc>
</attr>


=== Delivery Delays Percentiles ============================================================
<attr id="704" name="zimbraFeatureMailForwardingInFiltersEnabled" type="boolean"
                    0%      25%      50%      75%      90%      95%      98%      100%
cardinality="single" optionalIn="account,cos" flags="accountInfo,accountInherited,
--------------------------------------------------------------------------------------------
domainAdminModifiable" since="5.0.10">
Before qmgr      0.01      0.03      0.06      0.14      0.27      0.34      0.48      2.60
  <defaultCOSValue>TRUE</defaultCOSValue>
In qmgr          0.00      0.00      0.08    117.50    193.00    216.00    231.48    246.00
  <desc>enable end-user mail forwarding defined in mail filters features</desc>
Conn setup        0.00      0.00      0.00      0.00      0.02      0.04      0.22    20.00
</attr>
Transmission      0.05      0.09      3.60      9.80    10.00    10.00    11.00    160.00
Total            0.07      0.13      3.80    129.00    203.00    226.00    241.64    259.00
============================================================================================
</pre>
</pre>


======zmaccts======
=====Configure External MTA To Use LDAP Virtual Alias Maps=====


One way to note accounts that are actively logging in vs. those that aren't, can help shrink the number of accounts you might want to investigate or monitor. [example below, I cut out a lot of the accounts]
Here's the basic info in regards to how Zimbra's mta [postfix/etc] uses Zimbra's LDAP to get the forwarding information:


<pre>
  $ grep Forward conf/ldap-*
          account                          status            created      last logon
conf/ldap-vam.cf:result_attribute = 
------------------------------------  -----------    --------------- ---------------
zimbraMailDeliveryAddress,zimbraMailForwardingAddress,
zcstest001@zcs806.DOMAIN.com                active      01/20/14 18:47  03/02/14 21:11
zimbraPrefMailForwardingAddress,zimbraMailCatchAllForwardingAddress
zcstest002@zcs806.DOMAIN.com                active      01/30/14 01:48  02/19/14 00:07
admin-20140415@zcs806.DOMAIN.com            active      04/15/14 14:42            never
archtest-prod-20140402@zcs806.DOMAIN        active      04/02/14 07:42            never


          account                          status            created      last logon
$ postconf |grep vam
------------------------------------  -----------    --------------- ---------------
  virtual_alias_maps = proxy:ldap:/opt/zimbra/conf/ldap-vam.cf
bruce@test1.lab                            active      02/22/14 09:32            never
test.cal@test1.lab                          active      04/06/14 05:35  04/06/14 05:35
test200@test1.lab                          active      04/12/14 00:50            never


                                domain summary
See http://www.postfix.org/postconf.5.html#virtual_alias_maps for more information.


    domain                  active    closed    locked    maintenance    total
====Confirming And Setting zimbraMtaRelayHost And zimbraMtaDnsLookupsEnabled====
-----------------------  --------  --------  --------  -------------  --------
test1.lab                        3        0        0              0        3
test2.com                        2        0        0              0        2
angad.com                        2        0        0              0        2
test.test                        3        0        0              0        3
test.DOMAIN.com                  6        0        0              0        6
zcs806.DOMAIN.com              58        0        0              0        58
zcs806.DOMAIN.com                2        0        0              0        2
</pre>


=====By Authentication Attempts=====
First we'll set '''''zimbraMtaRelayHost''''' and '''''zimbraMtaDnsLookupsEnabled''''' variables. These options are also shown in the admin console and can be configured there. These variable alone will not redirect ALL traffic to an external MTA first though. There's alao a variable called zimbraSmtpHostname that is in the global (zmprov gacf) and server (zmprov gs `hostname`) configs - addressed in the section below. It's defaulted value is 'localhost' - at least on a single ZCS configuration.


A fast way to see who is doing a lot of authentications, which normally happens when a spammer has compromised an account with a weak password, is to do:
In situations where you need/want all mail to be processed by, for example, an external non-Zimbra spam filter box you could set this variable to the spam filter servers hostname.
 
Normally, when zimbraMtaRelayHost is set to a non-zimbra external MTA would disable DNS lookups. If you disable DNS Lookups (under the MTA tab of the admin console, or with zmprov), Zimbra will end up using (according to the postconf man page) the "gethostbyname() system library routine which normally also looks in /etc/hosts" (based on the entries on the "hosts" line in /etc/nsswitch.conf). If you do this but don't also specify an SMTP relay host (typically your ISP's SMTP server), which will take care of checking DNS, you will reverse your ability to send mail: suddenly you can send mail to other users on the Zimbra server, but you can't send to the internet (though you can still receive mail from the internet either way).


<pre>
Query Global - `zmhostname` would use the value returned, you can manual type out the servername as well :
# cat /var/log/zimbra.log | sed -n 's/.*sasl_username=//p' | sort | uniq -c | sort -n
      1 Auser@domain.com
      3 Buser@domain.com
      4 Cuser@domain.com
      5 Duser@domain.com
    36 SPAMMER@domain.com
</pre>


'''Note - This might take a long time, if so - try pruning it down'''
zmprov gacf zimbraMtaRelayHost
zmprov gacf zimbraMtaDnsLookupsEnabled


Example:
Query Per Server - `zmhostname` would use the value returned, you can manual type out the servername as well :
<pre>
# cat /var/log/zimbra.log | grep sasl_username > /tmp/zimbra_sasl_username.txt
# cat /tmp/zimbra_sasl_username.txt | sed -n 's/.*sasl_username=//p' | sort | uniq -c | sort -n
      1 Auser@domain.com
      3 Buser@domain.com
      4 Cuser@domain.com
      5 Duser@domain.com
    36 SPAMMER@domain.com
</pre>


The full log event will look like this:
zmprov gs `zmhostname` zimbraMtaRelayHost
<pre>
zmprov gs `zmhostname` zimbraMtaDnsLookupsEnabled
zimbra1 postfix/smtpd[29431]: B28914D5978: client=xxxxx.server.com[w.x.y.z], sasl_method=LOGIN, sasl_username=user
zimbra1 postfix/cleanup[5522]: B28914D5978: message-id=<20090420154255.B28914D5978@zimbraserver.com>
zimbra1 postfix/qmgr[20690]: B28914D5978: from=<spam@spam.com>, size=6026, nrcpt=10 (queue active)
zimbra1 postfix/cleanup[3983]: 2BA56465D28: message-id=<20090420154255.B28914D5978@zimbraserver.com>
</pre>


Against your older logs, you could:
Note - if you get errors about doing the query on your non-mailstores like, "ERROR: zclient.IO_ERROR (invoke Connection refused, server: localhost) (cause: java.net.ConnectException Connection refused)" then you might need to adjust this variable. First query it, it's most likely set to localhost


<pre>
zmlocalconfig zimbra_zmprov_default_soap_server
# zcat /var/log/zimbra.log* | sed -n 's/.*sasl_username=//p' | sort | uniq -c | sort -n
</pre>


And you can look at the specific information for the user in question with:
If you had the error and it was set to localhost, modify it to be one of your mailstores.


<pre>
zmlocalconfig -e zimbra_zmprov_default_soap_server=mailstore.example.com
# grep -C2 "sasl_username=SPAMMER@domain.com" /var/log/zimbra.log
</pre>


Or if searching against the older logs:
No restart of anything is needed, the zmprov query should now work.


<pre>
Modify Global - `zmhostname` would use the value returned, you can manual type out the servername as well :
# zgrep -C2 "sasl_username=SPAMMER@domain.com" /var/log/zimbra.log*
</pre>


If you want to check on a specific message ID, do:
zmprov mcf zimbraMtaRelayHost hostname-of-ext-server:PORT
 
  ** ex : zmprov mcf zimbraMtaRelayHost primary.YYY.state.XX.us:25
<pre>
  ** At the end, 25 is the port number for smtp on the targeted system.
grep 9DF7520804A /var/log/zimbra.log*
  ** Adjust this number if you changed the smtp port.
</pre>
zmprov mcf zimbraMtaDnsLookupsEnabled FALSE


For older message logs:
Modify Per Server - `zmhostname` would use the value returned, you can manual type out the servername as well :


<pre>
zmprov ms `zmhostname` zimbraMtaRelayHost hostname-of-ext-server:PORT
zgrep 9DF7520804A /var/log/zimbra.log*
  ** ex : zmprov ms `zmhostname` zimbraMtaRelayHost primary.YYY.state.XX.us:25
</pre>
  ** At the end, 25 is the port number for smtp on the targeted system.  
  ** Adjust this number if you changed the smtp port.
zmprov ms `zmhostname` zimbraMtaDnsLookupsEnabled FALSE


To read/view the message in the queue:
====Confirming And Setting zimbraSmtpHostname====


/opt/zimbra/postfix/sbin/postcat -q 9DF7520804A
I'm assuming you already set, '''''zimbraMtaRelayHost''''' and '''''zimbraMtaDnsLookupsEnabled''''' for your needs - see above section. The variable called zimbraSmtpHostname is in the global (zmprov gacf) and server (zmprov gs `hostname`) configs. It's default value is set to 'localhost' - at least on a single ZCS configuration.


One would then normally lock/change password on the one account showing the most activity. Grep'ing the /var/log/zimbra.log with the username in question will also show the ip address being used, this can be blocked with your firewall.
In cases where you need/want all mail to be processed by, for example, an external non-Zimbra spam filter box you could set this variable to the spam filter boxes hostname.


To be alerted of a compromised account and have it lock automatically see below. Slightly modified from this reference : http://www.zimbra.com/forums/administrators/62613-identify-compromised-accounts.html#post278732 :
Query Global - `zmhostname` would use the value returned, you can manual type out the servername as well :


<pre>
zmprov gacf zimbraSmtpHostname


#!/bin/bash
Query Per Server - `zmhostname` would use the value returned, you can manual type out the servername as well :
# checks log file and gets a count of authentications sent per minute, per user
# and if the count exceeds the maxmails value the user's account is locked.


logfile="/var/log/zimbra.log"
zmprov gs `zmhostname` zimbraSmtpHostname
maxmails="10"
mydomain="example.com"
support="<postmaster-userid>@$mydomain"
accounts="/tmp/active_accounts"


su zimbra -c "/opt/zimbra/bin/zmaccts" | grep "@" | grep active | awk '{print $1}' > $accounts
Note - if you get errors about doing the query on your non-mailstores like, "ERROR: zclient.IO_ERROR (invoke Connection refused, server: localhost) (cause: java.net.ConnectException Connection refused)" then you might need to adjust this variable. First query it, it's most likely set to localhost


zgrep -i "auth ok" $logfile | sed 's/ / /g' | awk -F"[ :]" '{print $3":"$4,$11;}' | uniq -c | sort -n | \
  zmlocalconfig zimbra_zmprov_default_soap_server
while read line
do
    count=`echo ${line} | cut -d' ' -f 1`
    userid=`echo ${line} | cut -d' ' -f 3`
    timestamp=`echo ${line} | cut -d' ' -f 2`
    active=`grep "$userid@$mydomain" $accounts`


    if [ "$count" -gt "$maxmails" ] && [ "$active" == "$userid@$mydomain" ]; then
If you had the error and it was set to localhost, modify it to be one of your mailstores.
        echo "Maximum email rate exceeded, $userid@$mydomain will be locked"
        su zimbra -c "/opt/zimbra/bin/zmprov ma $userid@$mydomain zimbraAccountStatus locked"
        subject="$userid account locked due to excessive connections"
        # Email text/message
        message="/tmp/emailmessage.txt"
        echo "$userid account has been locked as there were $count connections made at"> $message
        echo "$timestamp.  Please have the user change their password, and check for phishing" >>$message
        echo "emails if possible." >>$message
        # send an email using /bin/mail
        /usr/bin/mail -s "$subject" "$support" < $message
        rm -f $message


        #update list of active accounts
zmlocalconfig -e zimbra_zmprov_default_soap_server=mailstore.example.com
        su zimbra -c "/opt/zimbra/bin/zmaccts" | grep "@" | grep active | awk '{print $1}' > $accounts
    fi
done


rm -f $accounts
No restart of anything is needed, the zmprov query should now work.


</pre>
Modify Global - `zmhostname` would use the value returned, you can manual type out the servername as well :


Then run it as a cron job. The frequency will depend on the number of accounts you're managing.
  zmprov mcf zimbraSmtpHostname hostname-of-ext-server
  ** ex : zmprov mcf zimbraSmtpHostname primary.YYY.state.XX.us


<pre>
Modify Per Server - `zmhostname` would use the value returned, you can manual type out the servername as well :
* * * * * /opt/zimbra/find_spammer.sh
</pre>


=====By Connecting IP - Useful For Blocking IP At Firewall=====
zmprov ms `zmhostname` zimbraSmtpHostname hostname-of-ext-server
  ** ex : zmprov ms `zmhostname` zimbraSmtpHostname primary.YYY.state.XX.us


See also the following:
====External Email Clients Setting A SMTP Server====


* http://wiki.zimbra.com/wiki/Log_Files#Logging_the_Originating_IP
The above variable, zimbraSmtpHostname, will not alter your third party email clients that are setting the smtp server to your ZCS mta's. Here are your options if you also need to have that traffic to go through another device [mta, spam filter, etc.] prior to local delivery [lmtp] to an internal address.


To find the originating IP address of where the emails are coming from:
* Set your clients to use the another devices ip address or hostname that you set for zimbraSmtpHostname.


grep 'connect from' /var/log/zimbra.log | sed 's/.*connect from.*\[\(.[^]]*\)\]/\1/g' | sort | uniq -c | sort -nr | head
If you can't do the above, for whatever reason -- maybe security constraints or issues that might arise being a hosting provider, then see below.


To check your older logs [example output below]:
# You could investigate the alternation of postfix's content_filter option to place the external device/host [a barracuda for example] within that process. postfix.org has information on this - [http://www.postfix.org/FILTER_README.html Postfix After-Queue Content Filter]. This would be unsupported by Zimbra.
# Contact Zimbra's Professional Services [PS] team for help.
# Setup another server using a mta of your choice [postfix , sendmail] that the clients can use for the smtp server variable. This "new" mta would then simply relay to the device - a barracuda box for example. The barracuda would then do what it needs to and then forwards the messages to the appropriate servers for delivery. Your ZCS mta's in the case of local delivery that would of normally occurred over lmtp - userA@domainC.com sending to userB@domainC.com .
 
===Global Or System Wide Filters===
 
There is no "supported" solution for this - depending on the exact circumstances. It's a complex issue because each request for "global filters" tends to be very specific on either what's to be filter, what actions are to be taken, and so forth.


<pre>
====RFE's Related To Global Filters====
zgrep 'connect from' /var/log/zimbra.log* | sed 's/.*connect from.*\[\(.[^]]*\)\]/\1/g' | sort | uniq -c | sort -nr | head
    36 10.137.xx.34
    34 127.0.0.1
</pre>


=====Open Relay Check=====
* "Define a default filter rule for spam that users can apply before custom filters"
** http://bugzilla.zimbra.com/show_bug.cgi?id=12701
* "admin assignable mail filters"
** http://bugzilla.zimbra.com/show_bug.cgi?id=35452


You should also confirm you aren't an open relay.
====Use The Legal Intercept Method====


<pre>
Depending on the details of your request, using the Legal Intercept options might be useful. You could take the results that goto the LI mailbox and then perform your admin global searches against your mailbox accounts to take the appropriate action.
$ host -t mx DOMAIN.com
DOMAIN.com mail is handled by 10 mail.DOMAIN.com.


$ telnet mail.DOMAIN.com 25
See [[Legal_Intercept]]
Trying 184.###.##.## ...
 
Connected to mail.DOMAIN.com.
====Sieve Filter Set For Every Account====
Escape character is '^]'.
 
220 mail.DOMAIN.com ESMTP Postfix
One could setup a forloop for all of your users and setup a sieve filter. Downside here is the rules are editable by the users and you would have to manage the rules for new accounts going forward.
helo support.test
250 mail.DOMAIN.com
mail from:<SPAMMER@domain.com>
250 2.1.0 Ok
rcpt to:<TEST@DOMAIN.COM>
554 5.7.1 <TEST@DOMAIN.COM>: Relay access denied


rcpt to:<SPAMMER@domain.com>
See [[User_Migration#Migrating_Sieve_Filter_Rules ]] for details.
554 5.7.1 Service unavailable; Client host [71.XXX.XX.XX] blocked
using zen.spamhaus.org; http://www.spamhaus.org/query/bl?ip=71.202.XX.XX
quit
221 2.0.0 Bye
Connection closed by foreign host.
</pre>


=====Telnet Test To Confirm/Show Authentication Required For SMTP/Port 25=====
====Double Check The Current Anti-Spam Options====


This is an example:
Make sure your request can't be solved by the current solutions described in [[Category:Anti-spam]] articles.


<pre>
====Postfix , Amavis Customizations====
esx2:~ ajcody$ telnet zcs723.EXAMPLE.com 25


Trying 10.137.27.32...
I've seen some posts on the forums that customers found their own workarounds by customizing postfix and amavis. This will most likely result in an unsupported situation. Unfortunately, those forum posts don't also include details that I can share here. Hopefully I can find them going forward and I'll post them here.
Connected to zcs723.EXAMPLE.com.
 
Escape character is '^]'.
===Global Disclaimer Options===
220 zcs723.EXAMPLE.com ESMTP Postfix
 
helo zcs723.EXAMPLE.com  << I typed
Here's the url to review for a "current" possibility:
250 zcs723.EXAMPLE.com
 
mail from:ajcody@zcs723.EXAMPLE.com  << I typed
* http://wiki.zimbra.com/index.php?title=Domain_Disclaimer_Extension_Admin_UI
250 2.1.0 Ok
 
rcpt to:ajcody2@zcs723.EXAMPLE.com   << I typed
And in the notes section there's a comment about multi-servers:
553 5.7.1 <ajcody@zcs723.EXAMPLE.com>: Sender address rejected: not logged in
 
</pre>
* http://wiki.zimbra.com/index.php?title=Talk:Domain_Disclaimer_Extension_Admin_UI


But note - if you do this from the ZCS server or a server that is within the ip range or has it's specific ip listed in the mynetworks, you will not get this authentication requirement.
Please note though, "This article is a community contribution and may include unsupported customizations." Meaning, it's an unsupported customization, so please take the necessary precautions.


<pre>
In regards to an official and supported way to do this, please review this RFE:
[root@zcs723 ~]# telnet localhost 25
 
Trying ::1...
* http://bugzilla.zimbra.com/show_bug.cgi?id=4720
telnet: connect to address ::1: Connection refused
 
Trying 127.0.0.1...
===Quota Issues===
Connected to localhost.
 
Escape character is '^]'.
====Where To Adjust Message User Gets When They Are Over Quota====
220 zcs723.EXAMPLE.com ESMTP Postfix
 
helo myworkstation
Moved to [[How_To_Adjust_The_Over_Quota_Message_The_User_Receives]]
250 zcs723.EXAMPLE.com
 
ehlo myworkstation
====See Current User Qoutas====
250-zcs723.EXAMPLE.com
 
250-PIPELINING
Moved to [[Getting_All_Users_Quota_Data]]
250-SIZE 10240000
 
250-VRFY
====Controlling Behavior For Messages Sent To Over Quota Mailbox - LMTP====
250-ETRN
 
250-STARTTLS
Moved to [[Controlling_Behavior_For_Messages_Sent_To_Over_Quota_Mailbox_-_LMTP]]
250-AUTH LOGIN PLAIN
 
250-AUTH=LOGIN PLAIN
====Controlling Behavior For Messages Sent To Over Quota Mailbox - SMTP====
250-ENHANCEDSTATUSCODES
 
250-8BITMIME
Moved to [[Controlling_Behavior_For_Messages_Sent_To_Over_Quota_Mailbox_-_SMTP]]
250 DSN
 
mail from:<ajcody@zcs723.EXAMPLE.com>
====Message Senders Receive About Mailbox Over Quota====
250 2.1.0 Ok
 
rcpt to: <ajcody2@zcs723.EXAMPLE.com>
Moved to [[Message_Senders_Receive_About_Mailbox_Over_Quota]]
250 2.1.5 Ok
data
354 End data with <CR><LF>.<CR><LF>
From: Adam <ajcody@zcs723.EXAMPLE.com>
To: Adam 2 <ajcody2@zcs723.EXAMPLE.com>
Subject: From Localhost - NOT Auth
test
.
250 2.0.0 Ok: queued as 8B19E1E78D1
quit
221 2.0.0 Bye
Connection closed by foreign host.
</pre>


====Resources====
====Quota Not Showing In Admin Console - After ZCS Upgrade====


A list of resources you'll find useful:
Moved to [[Quota_Not_Showing_In_Admin_Console_-_After_ZCS_Upgrade]]


* [[Zimbra_MTA#Anti-Spam_Training_Filters]]
===Managing Postfix Queue===
* [[CLI_zmtrainsa]]
* [[Improving_Anti-spam_system]]
* [[Postfix_Policyd]]
* [[IP_Address_whitelisting]]
* [[Spam_training]]
*  Restrict by user
** [[RestrictPostfixRecipients]]
* Restrict by ip addresses and sender and other items:
** [http://www.postfix.org/RESTRICTION_CLASS_README.html Postfix - Restriction Class Readme]
*** Note, from the readme:
**** "What follows is based on the SMTP client IP address, and therefore is subject to IP spoofing."
**** "What follows is based on the sender SMTP envelope address, and therefore is subject to SMTP sender spoofing."


Wiki articles that have been assigned to the anit-spam category:
Moved to [[Managing_The_Postfix_Queues#Managing_The_Postfix_Queues]]


* [http://wiki.zimbra.com/index.php?title=Category:Anti-spam Category:Anti-spam]
====Postfix, Amavis, Clamav Spool Directory Paths And Names====


Down to the end-user:
Moved to [[Managing_The_Postfix_Queues#Postfix.2C_Amavis.2C_Clamav_Spool_Directory_Paths_And_Names]]


* [[Cool_User_Spam_Filters]]
====Stop And Starting Postfix And Mta====
* [http://www.zimbra.com/community/end_user_guide_and_how_to.html End-User Guide And How-To]


=====External Relay Test Pages=====
Moved to [[Managing_The_Postfix_Queues#Stop_And_Starting_Postfix_And_Mta]]


* http://www.checkor.com/
====To See Postfix Queue====
** Note - this test is in regards to the From spoofing spammers sometimes do for DL's.
** Also, for the test - make an account/DL on your system for test1@[your domain] . Otherwise you'll just error about account not existing.
<pre>
RSET
250 2.0.0 Ok
MAIL FROM: spam@mail59.DOMAIN.com
250 2.1.0 Ok
RCPT TO: test1@mail59.DOMAIN.com
Test Failed, 250 2.1.5 Ok
</pre>


* http://www.mailradar.com/openrelay/
Moved to [[Managing_The_Postfix_Queues#To_See_The_Postfix_Queues]]


====Blocking MAIL FROM - smtpd_sender_restrictions - Default Is Empty====
=====Qshape - Print Postfix queue domain and age distribution=====


=====External References=====
Moved to [[Managing_The_Postfix_Queues#Qshape_-_Print_Postfix_queue_domain_and_age_distribution]]


* External Sources
====To View A Message In The Queue====
** Postfix
*** [http://www.postfix.org/postconf.5.html#smtpd_sender_restrictions Postfix On smtpd_sender_restrictions]
** Milter
*** [http://www.postfix.org/MILTER_README.html#limitations Postfix's Milter Readme - Limitations]
**** [http://puszcza.gnu.org.ua/software/mailfromd/ Mailfromd]
***** [http://puszcza.gnu.org.ua/software/mailfromd/manual/html_section/SAV.html#SEC7 Mailfromd - Sender Address Verification]
** [http://www.symantec.com/connect/articles/anti-spam-solutions-and-security Anti-Spam Solutions and Security]


=====Zimbra References And Bugs & RFE's=====
Moved to [[Managing_The_Postfix_Queues#To_View_A_Message_In_The_Queue]]


* Zimbra Related Soures
====To Flush Postfix Queue====
** "policy for who can send to a distribution lists"
*** https://bugzilla.zimbra.com/show_bug.cgi?id=9620
**** '''Note - This will not stop spammers from mailing into your DL's by way of forged Mail From and guessing your DL address in the To'''
** "support smtpd_sender_login_maps for smtp auth"
*** http://bugzilla.zimbra.com/show_bug.cgi?id=11258
** "Implement smtpd_sender_restrictions"
*** http://bugzilla.zimbra.com/show_bug.cgi?id=15808
** "milter to check if sender can send to a distribution list"
*** https://bugzilla.zimbra.com/show_bug.cgi?id=46311
**** Dependent upon bug 9620
** Zimbra Forum Post on using smtpd_sender_restrictions options
*** [http://www.zimbra.com/forums/administrators/28770-how-enforce-sasl_username-address.html  How to enforce sasl_username=FROM ADDRESS"
** Another Zimbra Forum Post on using smtpd_sender_restrictions options
*** [http://www.zimbra.com/forums/administrators/39095-need-urgent-help-spamming-issue.html Need urgent help on spamming issue]


=====Protecting DL's From Spammers - Forging Mail From=====
Moved to [[Managing_The_Postfix_Queues#To_Flush_Postfix_Queue]]


======First Recommendation - As Given By Dev's From Critical Meeting Notes======
====To Requeue Messages In Postfix====


----
Moved to [[Managing_The_Postfix_Queues#To_Requeue_Messages_In_Postfix]]


* Enabled SASL/SMTP Authentication
====To Put Messages On Hold====
** Ref: http://wiki.zimbra.com/index.php?title=SMTP_Auth_Problems
* Implement how-to as described in :
** Permitted Senders: [[RestrictPostfixRecipients]]
*** '''Note: You'll see on the above page a reference to the spoof hole.'''
**** '''''"This method can be spoofed by forging the MAIL FROM: header (so mail appears to originate from within the domain), so it isn't foolproof, but it works for basic needs."'''''
*** '''Note: You'll also modify the instructions as above with addition details provided below.'''
* Force authentication for local-domain senders:
** modify the main.cf to have the following:
*** smtpd_sender_restrictions = check_sender_access hash:/path/to/file
** Then for the /path/to/file that you used in the mail.cf for smtpd_sender_restrictions, you'll have a line like:
*** example.com            permit_sasl_authenticated, reject


======Second Recommendation - Unpredictable DL name or Non-routing Domain======
Moved to [[Managing_The_Postfix_Queues#To_Put_Messages_On_Hold]]


----
====To Delete Messages From Queue====


Do not use predictable DL names. Instead of using everyone@company.com , use something like everyone-[random-string]@company.com .
Moved to [[Managing_The_Postfix_Queues#To_Delete_Messages_From_Queue]]


Another option is to use a non-routing domain - company.local - and setup your DL's there. You'll want to configure your main domain to be able to query the GAL of this domain.
=====Cautionary Note=====


To see the existing setting:
Moved to [[Managing_The_Postfix_Queues#Cautionary_Note]]


zmprov gd [domainname] zimbraGalLdapSearchBase
=====Relevant Sections Of Postsuper Man Page=====


To change the variable for the domain:
Moved to [[Managing_The_Postfix_Queues#Relevant_Sections_Of_Postsuper_Man_Page]]


zmprov md [domainname] zimbraGalInternalSearchBase ROOT
=====To Delete Single Message From Queue=====


======Third Recommendation - Using smtpd_sender_restrictions======
Moved to [[Managing_The_Postfix_Queues#To_Delete_Single_Message_From_Queue]]


----
=====To Delete ALL Messages From Queue=====


:::'''Work In Progress. I'm testing this now. Please don't attempt until this line is removed.'''
Moved to [[Managing_The_Postfix_Queues#To_Delete_ALL_Messages_From_Queue]]


Update: See the following:
======To Delete ALL Messages From The Deferred Queue======
* "Enforcing a match between the FROM Address and sasl_username in Zimbra Collaboration Server (2011281)"
** http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2011281


This should work if your "clients" are using ZWC, ZCO, or ActiveSync mobile devices. If you are using IMAP/POP + STMP thick clients, you'll most likely have to enable smtp authentication [sasl] and use the reject_authenticated_sender_login_mismatch variable instead.
Moved to [[Managing_The_Postfix_Queues#To_Delete_ALL_Messages_From_The_Deferred_Queue]]


postconf -e smtpd_sender_restrictions=reject_sender_login_mismatch
======To Delete ALL Messages From The Hold Queue======
postfix reload


This option is described as: 
Moved to [[Managing_The_Postfix_Queues#To_Delete_ALL_Messages_From_The_Hold_Queue]]


:'''''reject_sender_login_mismatch'''''
=====To Delete Many Messages From Queue=====
:: ''Reject the request when $smtpd_sender_login_maps  specifies an owner for the MAIL FROM address, but the client is not (SASL) logged in as that MAIL FROM address owner; or when the client is (SASL) logged in, but the client login name doesn't own the MAIL FROM address according to $smtpd_sender_login_maps.''  [http://www.postfix.org/postconf.5.html#smtpd_sender_restrictions Man page]


====Some Other SMTP Sending Restrictions====
Moved to [[Managing_The_Postfix_Queues#To_Delete_Many_Messages_From_Queue]]


=====Blocking Incoming From Domain And By User=====
=====Delete From Queue By Email Address=====


See the following:
Moved to [[Managing_The_Postfix_Queues#Delete_From_Queue_By_Email_Address]]


* [[Domain_level_blocking_of_users]]
======From CLI======
* [[Improving_Anti-spam_system#Implementing_Whitelist.2FBlacklist]]


=====check_client_access=====
Moved to [[Managing_The_Postfix_Queues#From_CLI]]


The smtpd_client_restrictions parameter restricts what clients this system accepts SMTP connections from. The default behavior is to allow SMTP connections from any client. This is discussed under [http://www.postfix.org/spam.html Spam Controls] on the Postfix site.
======Script To Delete From Queue By Email Address======


Example:
Moved to [[Managing_The_Postfix_Queues#Script_To_Delete_From_Queue_By_Email_Address]]


check_client_access regexp:/etc/postfix/access_sender_client_server,
======Script To Delete From Queue By Various Variable Targets======


Example:
Moved to [[Managing_The_Postfix_Queues#Script_To_Delete_From_Queue_By_Various_Variable_Targets]]


check_sender_access regexp:/etc/postfix/access_sender_toplevel
{{Article Footer|Zimbra Collaboration 8.0, 7.0|04/16/2014}}


=====smtpd_reject_unlisted_sender=====
----
 
Details can be found on the [http://www.postfix.org/postconf.5.html#smtpd_reject_unlisted_recipient mail.cf] Postfix page.
 
Example:
 
smtpd_reject_unlisted_sender = yes
 
Possible Bug:
http://bugzilla.zimbra.com/show_bug.cgi?id=24889
 
====What's Your SPF Records Say, When Getting "does not designate 74.x.x.x as permitted sender Errors"====
 
This is most likely related to the SPF records for your domain and what the header content of the sending email states as it's Mail From. For example, this is from the header of an email that was "received":
 
<pre>
Received: from mail.XYZ-FAKE.com (mailhost.XYZ-FAKE.com [74.X.X.244]) by mta01.ABC-FAKE.com with ESMTP id
Cft0mO3fjlFGQjTA for <support@ABC-FAKE.com>; Tue, 21 Apr 2009 05:14:13 -0700 (PDT)
X-Barracuda-Envelope-From: testuser@XYZ-FAKE.com
Received-SPF: pass (mta01.ABC-FAKE.com: domain of testuser@XYZ-FAKE.com designates 74.X.X.244 as permitted sender)
receiver=mta01.ABC-FAKE.com; client_ip=74.X.X.244; envelope-from=testuser@XYZ-FAKE.com;
</pre>
 
To see what this check was done against, do the following below. I'll trim the output and adjust the information used to protect the innocent. Also, notice how a DNS "alias" might cause an issue here? :
 
<pre>
 
$ host 74.X.X.244
244.X.X.74.in-addr.arpa domain name pointer mailhost.XYZ-FAKE.com.
 
$ host mailhost.XYZ-FAKE.com
mailhost.XYZ-FAKE.com has address 74.X.X.244
 
$ host mail.XYZ-FAKE.com
mail.XYZ-FAKE.com is an alias for mailhost.XYZ-FAKE.com.
mailhost.XYZ-FAKE.com has address 74.X.X.244
 
$ dig XYZ-FAKE.com MX
 
;; QUESTION SECTION:
;XYZ-FAKE.com. IN MX
 
;; ANSWER SECTION:
XYZ-FAKE.com. 3600 IN MX 22 serverA.DNS-FAKE.com.
XYZ-FAKE.com. 3600 IN MX 11 serverB.DNS-FAKE.com.
 
$ dig XYZ-FAKE.com TXT
 
;; QUESTION SECTION:
;XYZ-FAKE.com. IN TXT
 
;; ANSWER SECTION:
XYZ-FAKE.com. 3600 IN TXT "v=spf1 a:mail.XYZ-FAKE.com ~all"
 
</pre>
 
See the following for more information:
 
* http://www.openspf.org/
* http://www.schlitt.net/spf/spf_classic/draft-schlitt-spf-classic-02.html#publishing
** All of the 3.x section.
 
===Using Different SMTP Server For Webclient (ZWC), Mobiles, And ZCO===
 
====Note Of Caution About Using External MTAs====
 
Using non-zimbra MTA's can cause some options in zimbra to not function anymore - since it no longer has zimbra's mta services available.
 
=====Zimbra Mail Forwarding Possibly Will Not Work - Turn Off User Option To Set MailForwarding=====
 
Mail forwarding might no longer work depending on the configuration you setup regarding the use of your external mta's. When this happens you'll most likely want to disable the option for users to set a mail forwarding address in their preferences. This can be done via their COS or USER configuration.
 
* In the admin console, goto the COS configuration the user/s are using and the "Features" tab. Uncheck the option "Allow the user to specify a forwarding address" under Mail Features. It is in the same location under a USERs configuration panel in the admin console.
 
In the CLI, you will see these set as the defaults for the default COS. The admin gui option above only adjusts the zimbraFeatureMailForwardingEnabled variable :
 
$ zmprov gc default | grep zimbraFeatureMailForwarding
    zimbraFeatureMailForwardingEnabled: TRUE
    zimbraFeatureMailForwardingInFiltersEnabled: TRUE
 
$ zmprov ga ajcody@`zmhostname` | grep zimbraFeatureMailForwarding
    zimbraFeatureMailForwardingEnabled: TRUE
    zimbraFeatureMailForwardingInFiltersEnabled: TRUE
 
More details about them are in the /opt/zimbra/conf/attrs/zimbra-attrs.xml file.
 
<pre>
<attr id="342" name="zimbraFeatureMailForwardingEnabled" type="boolean" cardinality="single"
optionalIn="account,cos" flags="accountInfo,accountInherited,domainAdminModifiable">
  <defaultCOSValue>TRUE</defaultCOSValue>
  <desc>enable end-user mail forwarding features</desc>
</attr>
 
<attr id="704" name="zimbraFeatureMailForwardingInFiltersEnabled" type="boolean"
cardinality="single" optionalIn="account,cos" flags="accountInfo,accountInherited,
domainAdminModifiable" since="5.0.10">
  <defaultCOSValue>TRUE</defaultCOSValue>
  <desc>enable end-user mail forwarding defined in mail filters features</desc>
</attr>
</pre>
 
=====Configure External MTA To Use LDAP Virtual Alias Maps=====
 
Here's the basic info in regards to how Zimbra's mta [postfix/etc] uses Zimbra's LDAP to get the forwarding information:
 
$ grep Forward conf/ldap-*
conf/ldap-vam.cf:result_attribute = 
zimbraMailDeliveryAddress,zimbraMailForwardingAddress,
zimbraPrefMailForwardingAddress,zimbraMailCatchAllForwardingAddress
 
$ postconf |grep vam
virtual_alias_maps = proxy:ldap:/opt/zimbra/conf/ldap-vam.cf
 
See http://www.postfix.org/postconf.5.html#virtual_alias_maps for more information.
 
====Confirming And Setting zimbraMtaRelayHost And zimbraMtaDnsLookupsEnabled====
 
First we'll set '''''zimbraMtaRelayHost''''' and '''''zimbraMtaDnsLookupsEnabled''''' variables. These options are also shown in the admin console and can be configured there. These variable alone will not redirect ALL traffic to an external MTA first though. There's alao a variable called zimbraSmtpHostname that is in the global (zmprov gacf) and server (zmprov gs `hostname`) configs - addressed in the section below. It's defaulted value is 'localhost' - at least on a single ZCS configuration.
 
In situations where you need/want all mail to be processed by, for example, an external non-Zimbra spam filter box you could set this variable to the spam filter servers hostname.
 
Normally, when zimbraMtaRelayHost is set to a non-zimbra external MTA would would disable DNS lookups. If you disable DNS Lookups (under the MTA tab of the admin console, or with zmprov), Zimbra will end up using (according to the postconf man page) the "gethostbyname() system library routine which normally also looks in /etc/hosts" (based on the entries on the "hosts" line in /etc/nsswitch.conf). If you do this but don't also specify an SMTP relay host (typically your ISP's SMTP server), which will take care of checking DNS, you will reverse your ability to send mail: suddenly you can send mail to other users on the Zimbra server, but you can't send to the internet (though you can still receive mail from the internet either way).
 
Query Global - `zmhostname` would use the value returned, you can manual type out the servername as well :
 
zmprov gacf zimbraMtaRelayHost
zmprov gacf zimbraMtaDnsLookupsEnabled
 
Query Per Server - `zmhostname` would use the value returned, you can manual type out the servername as well :
 
zmprov gs `zmhostname` zimbraMtaRelayHost
zmprov gs `zmhostname` zimbraMtaDnsLookupsEnabled
 
Note - if you get errors about doing the query on your non-mailstores like, "ERROR: zclient.IO_ERROR (invoke Connection refused, server: localhost) (cause: java.net.ConnectException Connection refused)" then you might need to adjust this variable. First query it, it's most likely set to localhost
 
zmlocalconfig zimbra_zmprov_default_soap_server
 
If you had the error and it was set to localhost, modify it to be one of your mailstores.
 
zmlocalconfig -e zimbra_zmprov_default_soap_server=mailstore.example.com
 
No restart of anything is needed, the zmprov query should now work.
 
Modify Global - `zmhostname` would use the value returned, you can manual type out the servername as well :
 
zmprov mcf zimbraMtaRelayHost hostname-of-ext-server:PORT
  ** ex : zmprov mcf zimbraMtaRelayHost primary.YYY.state.XX.us:25
  ** At the end, 25 is the port number for smtp on the targeted system.
  ** Adjust this number if you changed the smtp port.
zmprov mcf zimbraMtaDnsLookupsEnabled FALSE
 
Modify Per Server - `zmhostname` would use the value returned, you can manual type out the servername as well :
 
zmprov ms `zmhostname` zimbraMtaRelayHost hostname-of-ext-server:PORT
  ** ex : zmprov ms `zmhostname` zimbraMtaRelayHost primary.YYY.state.XX.us:25
  ** At the end, 25 is the port number for smtp on the targeted system.
  ** Adjust this number if you changed the smtp port.
zmprov ms `zmhostname` zimbraMtaDnsLookupsEnabled FALSE
 
====Confirming And Setting zimbraSmtpHostname====
 
I'm assuming you already set, '''''zimbraMtaRelayHost''''' and '''''zimbraMtaDnsLookupsEnabled''''' for your needs - see above section. The variable called zimbraSmtpHostname is in the global (zmprov gacf) and server (zmprov gs `hostname`) configs. It's default value is set to 'localhost' - at least on a single ZCS configuration.
 
In cases where you need/want all mail to be processed by, for example, an external non-Zimbra spam filter box you could set this variable to the spam filter boxes hostname.
 
Query Global - `zmhostname` would use the value returned, you can manual type out the servername as well :
 
zmprov gacf zimbraSmtpHostname
 
Query Per Server - `zmhostname` would use the value returned, you can manual type out the servername as well :
 
zmprov gs `zmhostname` zimbraSmtpHostname
 
Note - if you get errors about doing the query on your non-mailstores like, "ERROR: zclient.IO_ERROR (invoke Connection refused, server: localhost) (cause: java.net.ConnectException Connection refused)" then you might need to adjust this variable. First query it, it's most likely set to localhost
 
zmlocalconfig zimbra_zmprov_default_soap_server
 
If you had the error and it was set to localhost, modify it to be one of your mailstores.
 
zmlocalconfig -e zimbra_zmprov_default_soap_server=mailstore.example.com
 
No restart of anything is needed, the zmprov query should now work.
 
Modify Global - `zmhostname` would use the value returned, you can manual type out the servername as well :
 
zmprov mcf zimbraSmtpHostname hostname-of-ext-server
  ** ex : zmprov mcf zimbraSmtpHostname primary.YYY.state.XX.us
 
Modify Per Server - `zmhostname` would use the value returned, you can manual type out the servername as well :
 
zmprov ms `zmhostname` zimbraSmtpHostname hostname-of-ext-server
  ** ex : zmprov ms `zmhostname` zimbraSmtpHostname primary.YYY.state.XX.us
 
====External Email Clients Setting A SMTP Server====
 
The above variable, zimbraSmtpHostname, will not alter your third party email clients that are setting the smtp server to your ZCS mta's. Here are your options if you also need to have that traffic to go through another device [mta, spam filter, etc.] prior to local delivery [lmtp] to an internal address.
 
* Set your clients to use the another devices ip address or hostname that you set for zimbraSmtpHostname.
 
If you can't do the above, for whatever reason -- maybe security constraints or issues that might arise being a hosting provider, then see below.
 
# You could investigate the alternation of postfix's content_filter option to place the external device/host [a barracuda for example] within that process. postfix.org has information on this - [http://www.postfix.org/FILTER_README.html Postfix After-Queue Content Filter]. This would be unsupported by Zimbra.
# Contact Zimbra's Professional Services [PS] team for help.
# Setup another server using a mta of your choice [postfix , sendmail] that the clients can use for the smtp server variable. This "new" mta would then simply relay to the device - a barracuda box for example. The barracuda would then do what it needs to and then forwards the messages to the appropriate servers for delivery. Your ZCS mta's in the case of local delivery that would of normally occurred over lmtp - userA@domainC.com sending to userB@domainC.com .
 
===Global Or System Wide Filters===
 
There is no "supported" solution for this - depending on the exact circumstances. It's a complex issue because each request for "global filters" tends to be very specific on either what's to be filter, what actions are to be taken, and so forth.
 
====RFE's Related To Global Filters====
 
* "Define a default filter rule for spam that users can apply before custom filters"
** http://bugzilla.zimbra.com/show_bug.cgi?id=12701
* "admin assignable mail filters"
** http://bugzilla.zimbra.com/show_bug.cgi?id=35452
 
====Use The Legal Intercept Method====
 
Depending on the details of your request, using the Legal Intercept options might be useful. You could take the results that goto the LI mailbox and then perform your admin global searches against your mailbox accounts to take the appropriate action.
 
See [[Legal_Intercept]]
 
====Sieve Filter Set For Every Account====
 
One could setup a forloop for all of your users and setup a sieve filter. Downside here is the rules are editable by the users and you would have to manage the rules for new accounts going forward.
 
See [[User_Migration#Migrating_Sieve_Filter_Rules ]] for details.
 
====Double Check The Current Anti-Spam Options====
 
Make sure your request can't be solved by the current solutions described in [[Category:Anti-spam]] articles.
 
====Postfix , Amavis Customizations====
 
I've seen some posts on the forums that customers found their own workarounds by customizing postfix and amavis. This will most likely result in an unsupported situation. Unfortunately, those forum posts don't also include details that I can share here. Hopefully I can find them going forward and I'll post them here.
 
===Global Disclaimer Options===
 
Here's the url to review for a "current" possibility:
 
* http://wiki.zimbra.com/index.php?title=Domain_Disclaimer_Extension_Admin_UI
 
And in the notes section there's a comment about multi-servers:
 
* http://wiki.zimbra.com/index.php?title=Talk:Domain_Disclaimer_Extension_Admin_UI
 
Please note though, "This article is a community contribution and may include unsupported customizations." Meaning, it's an unsupported customization, so please take the necessary precautions.
 
In regards to an official and supported way to do this, please review this RFE:
 
* http://bugzilla.zimbra.com/show_bug.cgi?id=4720
 
===Quota Issues===
 
====Where To Adjust Message User Gets When They Are Over Quota====
 
* From the web admin console:
** Configuration > Class of Service
** Select the COS in question
** Then goto the Advanced tab on the right
** There's a quota section. The sub-section you want is called:
*** "Quota warning message template:"
 
====See Current User Qoutas====
 
Please see [[Ajcody-Logging#Getting_All_User_Quota_Data_.28not_zmstat_related_really.29|Getting All User Quota Data (not zmstat related really)]]
 
====Controlling Behavior For Messages Sent To Over Quota Mailbox - LMTP====
 
The variable to set for a 452 Temp/Try Again response verses a 552 Permanent Error. This happens over lmtp rather than smtp. For smtp, see below.
 
zmprov gacf zimbraLmtpPermanentFailureWhenOverQuota
 
Setting to TRUE will flag it for the 552 response.
 
zmprov mcf zimbraLmtpPermanentFailureWhenOverQuota TRUE
 
References:
 
* "Configurable treatment for inbound over quota mail"
** http://bugzilla.zimbra.com/show_bug.cgi?id=27838
* http://www.zimbra.com/forums/administrators/19950-about-postfix-lmtp-quotas.html
 
====Controlling Behavior For Messages Sent To Over Quota Mailbox - SMTP====
 
References:
 
* RFE "quota check during smtp transaction"
** http://bugzilla.zimbra.com/show_bug.cgi?id=32592
** Currently, Sept 2010, targeted for the IronMaiden release.
* http://www.zimbra.com/forums/administrators/19950-about-postfix-lmtp-quotas.html
 
====Message Senders Receive About Mailbox Over Quota====
 
File that holds text of message:
 
/opt/zimbra/postfix/conf/bounce.cf.default
 
Note, please read the [http://www.postfix.org/bounce.5.html bounce MAN] page before you attempt to edit this file directly.
 
Also, I haven't been able to confirm the relationship of this above file with the postconf default output:
 
<pre>
[root@mail3 ~]# postconf | grep -i bounce
2bounce_notice_recipient = postmaster
backwards_bounce_logfile_compatibility = yes
bounce_notice_recipient = postmaster
bounce_queue_lifetime = 5d
bounce_service_name = bounce
bounce_size_limit = 50000
bounce_template_file =
disable_verp_bounces = no
double_bounce_sender = double-bounce
multi_recipient_bounce_reject_code = 550
soft_bounce = no
</pre>
 
To use a bounce.cf file, you'll want to add the file to variable and reload postfix via the zmmtactl script. It looks like zmlocalconfig doesn't currently handle this variable.
 
cp /opt/zimbra/postfix/conf/bounce.cf.default /opt/zimbra/postfix/conf/bounce.cf
postconf -e bounce_template_file="/opt/zimbra/postfix/conf/bounce.cf"
zmmtactl reload
 
Note, this might get lost during upgrades so make a note to yourself about this change.
 
Another reference : [http://www.howtoforge.com/configure-custom-postfix-bounce-messages Configure Customer Postfix Bounce Messages]
 
====Quota Not Showing In Admin Console - After ZCS Upgrade====
 
There might be some server attributes missing. To have the mail quota work properly, zimbraServiceInstalled mailbox must be true.
 
$zmprov gs `zmhostname` zimbraServiceInstalled
 
It must contain mailbox for the quota information to be available.
 
To set the zimbraServiceInstalled to true for "mailbox".
 
$zmprov ms `zmhostname` +zimbraServiceInstalled mailbox
 
I would think a zimbra restart would necessary as well for us to see the changes in the quota admin console view.
 
===Managing Postfix Queue===
 
====Postfix, Amavis, Clamav Spool Directory Paths And Names====
 
ls /opt/zimbra/data
  amavisd  clamav  dspam  postfix
 
ls /opt/zimbra/data/postfix/spool/
  active  active.old  bounce  corrupt  defer  deferred 
  flush  hold  incoming  incoming.old  maildrop  pid 
  private  public  saved  trace
 
====Stop And Starting Postfix And Mta====
 
To only stop and start postfix:
 
postfix stop
postfix start
 
To stop and start postfix, amavis, and clam:
 
zmmtactl stop
zmmtactl start
 
====To See Postfix Queue====
 
As zimbra using sudo - show a summary of queue count - ~/libexec/zmqstat:
<pre>
[zimbra@mail37 ~]$ sudo ~/libexec/zmqstat
hold=0
corrupt=0
deferred=0
active=0
incoming=0
</pre>
 
As zimbra - /opt/zimbra/postfix/sbin/postqueue -p
<pre>
[zimbra@mail37 ~]$ /opt/zimbra/postfix/sbin/postqueue -p
-Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient-------
EC753D0D00*    328 Thu Apr  5 14:34:09  sender@sourcedomainname.local
                                        recipient@destinationdomainname.local
 
-- 0 Kbytes in 1 Request.
</pre>
 
As zimbra - mailq
<pre>
[zimbra@mail37 ~]$ mailq
Mail queue is empty
</pre>
 
=====Qshape - Print Postfix queue domain and age distribution=====
 
/opt/zimbra/bin/qshape
 
References:
 
* http://www.postfix.org/qshape.1.html
* http://www.postfix.org/QSHAPE_README.html
 
Example output:
 
<pre>
$ qshape -s hold | head
                        T  5 10 20 40 80 160 320 640 1280 1280+
                TOTAL 486  0  0  1  0  0  2  4  20  40  419
            yahoo.com  14  0  0  1  0  0  0  0  1    0    12
  extremepricecuts.net  13  0  0  0  0  0  0  0  2    0    11
        ms35.hinet.net  12  0  0  0  0  0  0  0  0    1    11
      winnersdaily.net  12  0  0  0  0  0  0  0  2    0    10
          hotmail.com  11  0  0  0  0  0  0  0  0    1    10
          worldnet.fr  6  0  0  0  0  0  0  0  0    0    6
        ms41.hinet.net  6  0  0  0  0  0  0  0  0    0    6
                osn.de  5  0  0  0  0  0  1  0  0    0    4
</pre>
 
====To View A Message In The Queue====
 
Get the message id and use post cat:
 
/opt/zimbra/postfix/sbin/postcat -q EC753D0D00
 
or with more information, include the -v option:
 
/opt/zimbra/postfix/sbin/postcat -qv EC753D0D00
 
====To Flush Postfix Queue====
 
/opt/zimbra/postfix/sbin/postqueue -f
 
====To Requeue Messages In Postfix====
 
/opt/zimbra/postfix/sbin/postsuper -r ALL
 
More explanation from the postsuper man page:
 
<pre>
-r queue_id
              Requeue  the  message  with the named queue ID from
              the named mail queue(s) (default:  hold,  incoming,
              active  and  deferred).  To  requeue multiple mes-
              sages, specify multiple -r command-line options.
 
              Alternatively, if a queue_id of - is specified, the
              program reads queue IDs from standard input.
 
              Specify  "-r  ALL"  to  requeue  all messages. As a
              safety measure, the word ALL must be  specified  in
              upper case.
 
              A  requeued message is moved to the maildrop queue,
              from where  it  is  copied  by  the  pickup(8)  and
              cleanup(8)  daemons  to  a  new queue file. In many
              respects its handling differs from that  of  a  new
              local submission.
 
              o      The  message  is  not  subjected  to  the
                    smtpd_milters or non_smtpd_milters settings.
                    When  mail  has  passed  through an external
                    content filter, this would produce incorrect
                    results with Milter applications that depend
                    on original SMTP connection  state  informa-
                    tion.
 
              o      The  message  is  subjected  again  to  mail
                    address rewriting and substitution.  This is
                    useful  when rewriting rules or virtual map-
                    pings have changed.
 
                    The  address  rewriting  context  (local  or
                    remote)  is the same as when the message was
                    received.
 
              o      The message is subjected to  the  same  con-
                    tent_filter  settings  (if  any) as used for
                    new local mail submissions.  This is  useful
                    when content_filter settings have changed.
 
              Warning:  Postfix queue IDs are reused.  There is a
              very small possibility that  postsuper(1)  requeues
              the  wrong  message  file when it is executed while
              the Postfix mail system is  running,  but  no  harm
              should be done.
 
              This feature is available in Postfix 1.1 and later.
</pre>
 
====To Put Messages On Hold====
 
If there’s ‘*’ character next to queue ID , EC753D0D00* , it means that this message is in the active queue e.g. attempts to deliver the messages are made.
 
If there’s ‘!’ character next to queue ID , EC753D0D00! , it means that this message is put “on hold”.
 
To put a message on hold:
 
~# /opt/zimbra/postfix/sbin/postsuper -h EC753D0D00
 
To put on hold messages from user@domain.com:
~# /opt/zimbra/postfix/sbin/postqueue -p | awk ‘BEGIN { RS = “” } { if ($7 == “user@domain.com” ) print $1 }’ | tr -d ‘!*’ | postsuper -h -
 
To put all messages on hold:
 
~# /opt/zimbra/postfix/sbin/postsuper -h ALL
postsuper: Placed on hold: 6 messages
 
====To Delete Messages From Queue====
 
=====Cautionary Note=====
 
::'''Warning, deleting messages from the queue can have a negative consequence of your users. You might need to account for the action and/or confirm your deletion was appropriate. Please try to save the postqueue -p information from the various messages prior to deleting them. This will at least you give you he information to  later justify your actions on why you delete msg#.'''
 
=====Relevant Sections Of Postsuper Man Page=====
 
<pre>
By  default,  postsuper(1)  performs  the operations requested with the -s and -p
command-line options on all Postfix queue directories - this includes the incoming,
active and deferred directories with mail files and the bounce, defer, trace and flush
directories with log files.
 
  -d queue_id Delete one message with the named queue ID from the named mail queue(s)
    (default: hold, incoming, active and deferred).
    If a queue_id of - is specified, the program reads queue IDs from standard input.
    For example, to delete all mail with exactly one recipient user@example.com:
 
              mailq | tail +2 | grep -v '^ *(' | awk  'BEGIN { RS = "" }
                  # $7=sender, $8=recipient1, $9=recipient2
                  { if ($8 == "user@example.com" && $9 == "")
                        print $1 }
              ' | tr -d '*!' | postsuper -d -
 
      Specify "-d ALL" to remove all messages; for example, specify "-d ALL deferred"
      to delete all mail in the deferred queue.  As a safety measure, the word ALL must
      be specified in upper case.
 
      Warning: Postfix queue IDs are reused.  There is a very small possibility that
      postsuper deletes the wrong message file when it is executed while the Postfix mail
      system is delivering mail.
 
      The scenario is as follows:
      1)  The Postfix queue manager deletes the message that postsuper(1) is asked to
        delete, because Postfix is finished with the message (it is delivered, or it is
        returned to the sender).
      2)  New mail arrives, and the new message is given the same queue ID as the message
        that postsuper(1) is supposed to delete.  The probability for reusing a deleted
        queue ID is about 1 in 2**15 (the number  of  different microsecond values that
        the system clock can distinguish within a second).
      3)  postsuper(1) deletes the new message, instead of the old message that it should
        have deleted.
 
  -h queue_id Put mail "on hold" so that no attempt is made to deliver it.  Move one
    message with the named queue ID from the named mail queue(s) (default: incoming,
    active and deferred) to the hold queue.
 
    If a queue_id of - is specified, the program reads queue IDs from standard input.
    Specify "-h ALL" to hold all messages; for example, specify "-h ALL deferred" to hold
    all mail in the deferred queue.  As a safety measure, the word ALL must be specified
    in upper case.
    Note: while mail is "on hold" it will not expire when its time in the queue exceeds
    the maximal_queue_lifetime or bounce_queue_lifetime setting. It becomes subject to
    expiration after it is released from "hold".
 
  -H queue_id Release mail that was put "on hold".  Move one message with the named queue
    ID from the named mail queue(s) (default: hold) to the deferred queue.
 
    If a queue_id of - is specified, the program reads queue IDs from standard input.
    Note: specify "postsuper -r" to release mail that was kept on hold for a significant
    fraction of $maximal_queue_lifetime or $bounce_queue_lifetime, or longer.
 
    Specify "-H ALL" to release all mail that is "on hold".  As a safety measure, the
    word ALL must be specified in upper case.
 
  -p Purge old temporary files that are left over after system or software crashes.
</pre>
 
=====To Delete Single Message From Queue=====
 
/opt/zimbra/postfix/sbin/postsuper -d [MSGID From postqueue -p]
 
=====To Delete ALL Messages From Queue=====
 
/opt/zimbra/postfix/sbin/postsuper -d ALL
 
Another way to do this:
 
mailq | awk '{print $1}' | postsuper -d -
 
======To Delete ALL Messages From The Deferred Queue======
 
/opt/zimbra/postfix/sbin/postsuper -d ALL deferred
 
=====To Delete Many Messages From Queue=====
 
To delete a large number of files one would use:
 
/opt/zimbra/postfix/sbin/postsuper -d - < filename-with-queue-ids.txt
 
The filename, filename-with-queue-ids.txt example, would have a listing of id's like:
 
<pre>
3E1C6CAFFFE
6B862CC9D76
0BC38CC1BC9
90628CC6F3C
E26B9CC3C62
92A35CC943D
A84BDBCE15D
EA57CB1DF04
0F102CC74CB
386E8CC4DFF
92606CC0BDA
0799FC8149A
024CFCBD0DE
2D30FC47DA0
31D85CC6308
B8B3FC3DEBC
AA4C7C913D0
280F5CC8C6C
9F341CC8A26
93CD1B3B0EC
433D0BF3716
A1435CB4C38
2DB04CC911D
56A29CC8819
11881C8268C
5C050A79851
C6739CC4BA5
11D3FCC7D09
8CBC0B20E0A
</pre>
 
=====Delete From Queue By Email Address=====
 
'''Note - ''Some of the shell scripting below might fail on messages with particular status ("on delivery" or "on hold") because a "*" or a "!" is appended to the ID of the message.'''''
 
======From CLI======
 
Change the [ email@address.com ] variable below first.
 
'''To first see what would be deleted.''' As '''root''':
 
/opt/zimbra/postfix/sbin/postqueue -p | egrep -v '^ *\(|-Queue ID-' \
| awk 'BEGIN { RS = "" } { if ($7 == "email@domain.com") print $1} ' | tr -d '*!'
 
If you get error about egrep, you might need to use this syntax:
 
/opt/zimbra/postfix/sbin/postqueue -p | /bin/egrep -v '*\(|-Queue ID-' \
| awk 'BEGIN { RS = "" } { if ($7 == "email@address.com") print $1} ' | tr -d '*!'
 
 
'''To now delete, just include the postsuper -d at end''':
 
/opt/zimbra/postfix/sbin/postqueue -p | egrep -v '^ *\(|-Queue ID-' \
| awk 'BEGIN { RS = "" } { if ($7 == "email@domain.com") print $1} ' \
| tr -d '*!' | /opt/zimbra/postfix/sbin/postsuper -d -
 
'''''Older example of what I had; the ''tail +2'' was rhel4 specific'''''
 
:To first see what would be deleted:
 
:: <pre>mailq | tail +2 | grep -v '^ *(' | awk  'BEGIN { RS = "" } { if ($8 == "email@address.com" && $9 == "") print $1 } ' | tr -d '*!'</pre>
 
:To now delete, just include the postsuper -d at end:
 
:: <pre>mailq | tail +2 | grep -v '^ *(' | awk  'BEGIN { RS = "" } { if ($8 == "email@address.com" && $9 == "") print $1 } ' | tr -d '*!' | postsuper -d -</pre>
 
======Script To Delete From Queue By Email Address======
 
::'''Non-Zimbra Script and not QA'd or tested. Path adjusted though for /opt/zimbra/postfix/sbin/*'''
 
From http://www.ustrem.org/en/articles/postfix-queue-delete-en/
 
Save on file system, calling it something like - delete-queue-by-email.sh . Give it execute permission. '''Run as root'''. Example usage would be: ./delete-queue-by-email.sh  user-name@domain-test.com
 
<pre>
#!/usr/bin/perl -w
#
# pfdel - deletes message containing specified address from
# Postfix queue. Matches either sender or recipient address.
#
# Usage: pfdel <email_address>
#
 
use strict;
 
# Change these paths if necessary.
my $LISTQ = "/opt/zimbra/postfix/sbin/postqueue -p";
my $POSTSUPER = "/opt/zimbra/postfix/sbin/postsuper";
 
my $email_addr = "";
my $qid = "";
my $euid = $>;
 
if ( @ARGV !=  1 ) {
die "Usage: pfdel <email_address>\n";
} else {
$email_addr = $ARGV[0];
}
 
if ( $euid != 0 ) {
        die "You must be root to delete queue files.\n";
}
 
 
open(QUEUE, "$LISTQ |") ||
  die "Can't get pipe to $LISTQ: $!\n";
 
my $entry = <QUEUE>; # skip single header line
$/ = ""; # Rest of queue entries print on
# multiple lines.
while ( $entry = <QUEUE> ) {
if ( $entry =~ / $email_addr$/m ) {
($qid) = split(/\s+/, $entry, 2);
$qid =~ s/[\*\!]//;
next unless ($qid);
 
#
# Execute postsuper -d with the queue id.
# postsuper provides feedback when it deletes
# messages. Let its output go through.
#
if ( system($POSTSUPER, "-d", $qid) != 0 ) {
# If postsuper has a problem, bail.
die "Error executing $POSTSUPER: error " .
  "code " .  ($?/256) . "\n";
}
}
}
close(QUEUE);
 
if (! $qid ) {
die "No messages with the address <$email_addr> " .
  "found in queue.\n";
}
 
exit 0;
</pre>
 
======Script To Delete From Queue By Various Variable Targets======
 
::'''Non-Zimbra Script and not QA'd or tested. Path adjusted though for /opt/zimbra/postfix/sbin/*'''
 
From http://jwcub.wordpress.com/2006/01/20/bulk-delete-from-postfix-queue/
 
Perl script called “delete-from-mailq”:
 
<pre>
#!/usr/bin/perl
 
$REGEXP = shift || die “no email-adress given (regexp-style, e.g. bl.*\@yahoo.com)!”;
 
@data = qx;
for (@data) {
if (/^(\w+)(\*|\!)?\s/) {
$queue_id = $1;
}
if($queue_id) {
if (/$REGEXP/i) {
$Q{$queue_id} = 1;
$queue_id = “”;
}
}
}
 
open(POSTSUPER,”|/opt/zimbra/postfix/sbin/postsuper -d -”) || die “couldn’t open postsuper” ;
 
foreach (keys %Q) {
print POSTSUPER “$_\n”;
};
close(POSTSUPER);
</pre>
 
Save the above script to a file say “delete-queue.pl” in your home directory, and make it excutable:
 
chmod 755 delete-queue
 
Usage - '''Run as root''' :
 
*Delete all queued messages from or to the domain “iamspammer.com”
./delete-queue iamspammer.com
*Delete all queued messages to specific address “bogususer@mydomain.com”
./delete-queue bogususer@mydomain.com
*Delete all queued messages that begin with the word “bush” in the e-mail address:
./delete-queue bush*\@whateverdomain.com
*Delete all queued messages that contain the word “biz” in the e-mail address:
./delete-queue biz


[[Category: Community Sandbox]]
[[Category: Community Sandbox]]
[[Category: Author:Ajcody]]
[[Category: Zeta Alliance]]

Latest revision as of 19:28, 20 June 2016

Ajcody MTA Postfix Topics

   KB 2705        Last updated on 2016-06-20  




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Postfix - MTA

Actual MTA & Postfix Topics Homepage

Please see Ajcody-MTA-Postfix-Topics

Missing main.cf Error

Moved to Missing_main.cf_Error_-_MTA

MTA Mail Flow - Birds-eye Overview

Moved to Postfix-Amavisd_Mail_Flow_-_Birds-eye_Overview_-_MTA

Understanding /var/log/zimbra.log And Postfix Log Events

Moved to: Understanding_zimbra.log_And_Postfix_Log_Events_-_MTA

Postfix Queue ID vs. message-id

Moved to: Postfix_Queue_ID_vs._message-id_-_MTA

Authentication Log Events

Moved to Understanding_And_Troubleshooting_Authentication_Log_Events

IMAP And Authenticated SMTP [SSL] Example

Moved to Understanding_And_Troubleshooting_Authentication_Log_Events#IMAP_And_Authenticated_SMTP_.5BSSL.5D_Example

IMAP Test Via Telnet And Logging Events Of It - Proxy Included

Moved to Understanding_And_Troubleshooting_Authentication_Log_Events#IMAP_Test_Via_Telnet_And_Logging_Events_Of_It_-_Proxy_Included

IMAP Login Via Openssl - LOGIN TLS - Proxy Included

Moved to Understanding_And_Troubleshooting_Authentication_Log_Events#IMAP_Login_Via_Openssl_-_LOGIN_TLS_-_Proxy_Included

Network Tracing Between A Remote Host And A ZCS MTA

Moved to Network_Tracing_Between_A_Remote_Host_And_A_ZCS_MTA

Finding Messages - zmmsgtrace

See the following for details [for 7.1.1+]:

Documentation at CLI_zmmsgtrace . Note, if you get command not found as the zimbra user, try /opt/zimbra/libexec/zmmsgtrace instead.

How To Increase SMTP Debug Logging - MTA

Moved to How_To_Increase_SMTP_Debug_Logging_-_MTA

Simple Troubleshooting For SMTP Via Telnet, Openssl

Moved to Simple_Troubleshooting_For_SMTP_Via_Telnet_And_Openssl

First - Understanding Your Authentication Requirements In ZCS

Moved to Simple_Troubleshooting_For_SMTP_Via_Telnet_And_Openssl#First_-_Understanding_Your_Authentication_Requirements_In_ZCS

Second - Encoding Username And Passwords For AUTH Sequence

Moved to Simple_Troubleshooting_For_SMTP_Via_Telnet_And_Openssl#Second_-_Encoding_Username_And_Passwords_For_AUTH_Sequence

For ESMTP Auth is LOGIN - Example

Moved to Simple_Troubleshooting_For_SMTP_Via_Telnet_And_Openssl#For_ESMTP_Auth_is_LOGIN_-_Example

For ESMTP Auth is Plain - Example

Moved to Simple_Troubleshooting_For_SMTP_Via_Telnet_And_Openssl#For_ESMTP_Auth_is_Plain_-_Example

For TLS/SSL - Example

Moved to Simple_Troubleshooting_For_SMTP_Via_Telnet_And_Openssl#For_TLS.2FSSL_-_Example

Testing Against Port 465

Moved to Simple_Troubleshooting_For_SMTP_Via_Telnet_And_Openssl#Testing_Against_Port_465

To Confirm An Auth User Can't Send With Another FROM Address

Moved to Simple_Troubleshooting_For_SMTP_Via_Telnet_And_Openssl#To_Confirm_An_Auth_User_Can.27t_Send_With_Another_FROM_Address

Adding A New MTA Server

Basic instructions can be found here:

Additional instructions needed beyond the above will follow as I hear about them.

Load Balancing For SMTP - Out Bound Mail

Currently, 5.x code, you have the following options:

    • An external load balancing device that will then split the traffic behind it
    • Setup a round-robin A record situation in your DNS for the external mta's you'll be using.

In, GNR/6.x, you are able to add multiple targets to the variables and we'll have some degree of "balancing" between them.

User Alias Mapping And Mail Transport with Postfix & LDAP

See User_Alias_Mapping_and_Mail_Transport_with_Postfix_&_LDAP

Multiple LDAP Servers?

Completed RFE:

  • "mta should be able to take a list of LDAP servers to take advantage of replicas."

From :

        server_host (default: localhost)
              The name of the host running the LDAP server,  e.g.

                  server_host = ldap.example.com

              Depending  on the LDAP client library you're using,
              it should be possible to specify  multiple  servers
              here,  with the library trying them in order should
              the first one fail. It should also be  possible  to
              give  each  server  in  the  list  a different port
              (overriding server_port below), by naming them like

                  server_host = ldap.example.com:1444

              With OpenLDAP, a (list of) LDAP URLs can be used to
              specify both the hostname(s) and the port(s):

                  server_host = ldap://ldap.example.com:1444
                              ldap://ldap2.example.com:1444

              All LDAP URLs accepted by the OpenLDAP library  are
              supported,  including  connections over UNIX domain
              sockets, and LDAP SSL (the last one  provided  that
              OpenLDAP was compiled with support for SSL):

                  server_host = ldapi://%2Fsome%2Fpath
                              ldaps://ldap.example.com:636

 **my note**
 This thread - http://archives.neohapsis.com/archives/postfix/2004-09/1763.html
 give me the impression they made a mistake in modifying the help file on this
 and they dropped the use/need of the command:

  server_host = ldap://ldap.example.com:1444, ldap://ldap2.example.com:1444

Just a small note on where var shows up:

[root@mail3 conf]# pwd
/opt/zimbra/conf
[root@mail3 conf]# grep server_host *
amavisd.conf.in:$myhostname = '@@zimbra_server_hostname@@';  # must be a fully-qualified domain name!
ldap-scm.cf:server_host = ldap://mail3.zimbra.DOMAIN.com:389
ldap-transport.cf:server_host = ldap://mail3.zimbra.DOMAIN.com:389
ldap-vad.cf:server_host = ldap://mail3.zimbra.DOMAIN.com:389
ldap-vam.cf:server_host = ldap://mail3.zimbra.DOMAIN.com:389
ldap-vmd.cf:server_host = ldap://mail3.zimbra.DOMAIN.com:389
ldap-vmm.cf:server_host = ldap://mail3.zimbra.DOMAIN.com:389
localconfig.xml:  <key name="zimbra_server_hostname">
zmmta.cf:	LOCAL zimbra_server_hostname
zmmta.cf:	POSTCONF myhostname		LOCAL zimbra_server_hostname

References:

Traditional Aliases Use - /etc/aliases Type Lookups

Moved to Traditional_Aliases_Use_-_/etc/aliases_Type_Lookups

Allowing Accounts To Change The From Address

Please see:

Related BUG/RFE's

Creating A Domain Alias

Please see ManagingDomains#Creating_a_Domain_Alias

Relay Domain Forwarding

Please see ManagingDomains#Relaying.2FDomain_Forwarding

Domain Catchall

Please see ManagingDomains#Domain_Catchall

Rewriting From Address For Outbound Email

Please see ManagingDomains#Domain_Masquerading

Rewrite Recipient Address For Incoming Email

There is a way to rewrite the incoming mail, but it's not a standard Zimbra feature. You can implement it as a configuration change in Postfix. Here's what you do:

  1. Create a file in /opt/zimbra/conf named 'postfix_recipientmap'.
    • The format is a single line that reads something like: @alias.domain.com @domain.com
  2. Run 'postmap postfix_recipientmap' in the conf directory.
  3. Run "postconf -e recipient_canonical_maps=hash:/opt/zimbra/conf/postfix_recipientmap".
  4. Run 'postfix reload'.

This will cause postfix to map any incoming mail with a recipient of '@alias.domain.com' to '@domain.com'. You will need to re-apply this postconf change after upgrades, though the postfix_recipientmap file should survive.

Automatic BCC

Option 1 - Via Postfix Customization

From the postfix website:

  • always_bcc = address
    • Deliver a copy of all mail to the specified address. In Postfix versions before 2.1, this feature is implemented by smtpd(8), qmqpd(8), or pickup(8).
  • sender_bcc_maps = type:table
    • Search the specified "type:table" lookup table with the envelope sender address for an automatic BCC address. This feature is available in Postfix 2.1 and later.
  • recipient_bcc_maps = type:table
    • Search the specified "type:table" lookup table with the envelope recipient address for an automatic BCC address. This feature is available in Postfix 2.1 and later.
  • Note: automatic BCC recipients are produced only for new mail. To avoid mailer loops, automatic BCC recipients are not generated for mail that Postfix forwards internally, nor for mail that Postfix generates itself.

Please see the following:

Option 2 - Via ZCS Legal Intercept

Generally used for Managing Legal Requests for Information

Description:

The ZCS legal intercept feature is used to obtain copies of email messages that are sent, received, or saved as drafts from targeted accounts and send these message to a designated “shadow” email address. Legal Intercept can be configured to send the complete content of the message or to send only the header information. When a targeted account sends, receives, or saves a draft message, an intercept message is automatically created to forward copies of the messages as attachments to the specified email address.

Please see:

Option 3 - Zimbra's Archiving And Discovery

See Ajcody-Notes-Archive-Discovery concerning A&D setup and options.

Limiting Or Increasing Number Of Recipents / Messages

Mailing Lists - Distribution Lists

Please see Ajcody-MailingLists-And-Mailman#Problems_Resolving_Virtual_Aliases_For_Members_Of_Large_Distribution_Lists

Policy Daemon

If you want to restrict messages per hour, you can look into Policy Daemon:

Beta release in ZCS 7 , see:

Postfix

Also, there are some default postfix parameters set to control sending a message to x amount recipients. The parameters you will need to look at are smtpd_recipient_limit & smtpd_recipient_overshoot_limit, these have a default value of 1000.

Postfix defines these parameters as:

  • smtpd_recipient_limit: The maximum number of recipients that the Postfix SMTP server accepts per message delivery request.
  • smtpd_recipient_overshoot_limit: The number of recipients that a remote SMTP client can send in excess of the limit specified with $smtpd_recipient_limit, before the Postfix SMTP server increments the per-session error count for each excess recipient.

From the command line you can change the default values.

su - zimbra
postconf -e smtpd_recipient_limit=<new value>
postconf -e smtpd_recipient_overshoot_limit=<new value>
postfix reload

Bugs RFE's For Customers To Get Behind

I'm wondering if policyd gives one the control everyone is looking for? I've not used it myself.

Policyd References:

There's other additions [add-on's] one can get for policyd.

We have this RFE in regards to policyd support:

Other related rfe/bugs, specially to push variables into admin web console:

Controlling SMTPD Client Connections

Mmorse did a good write up on these variables in the forum:

Postfix Resources At Their Site (All Clients/Connections):

Postfix Resources At Their Site (Exceptions To Clients/Connections Or Single Source):

Restrictions

Besides using external mailing list software, Mailman or Sympa, here's some other topical items in regards to restrictions.

Some user contributed articles:

Some Postfix references:

Some RFE's related to mta based restrictions [targets are based upon today - July 21, 2010]:

Spam Control And Related Issues

High Over View Steps Of What To Do

  • Step 1: Confirm your not an open relay and double check your postfix $mynetworks variable.
  • Step 2: Stop or put on-hold mail queue.
    • Put all messages into HOLD queue:
      • Get a report of your current mailq [can be useful if you clean out the queue later but need to identify what external mail hosts are now denying you and who you'll need to contact about getting removed from their denial list]
        • Example: /opt/zimbra/postfix/sbin/mailq > /tmp/zimbra_mailq_report.txt
      • /opt/zimbra/postfix/sbin/postsuper -h ALL
    • Or put all messages match compromised account into HOLD queue:
      • /opt/zimbra/postfix/sbin/mailq | grep user_compromised@domain | awk '{ print $1 }' | tr -d '!*' | /opt/zimbra/postfix/sbin/postsuper -h -
        • Note, this is an example - you might with the grep grab more than the compromised account with the match.
    • See whole section - Managing The Postfix Queue
  • Step 3: Check your mail log [On ZCS servers running MTA services] - /var/log/zimbra.log
  • Step 4: Identify compromised account authenticating SMTP AUTH connection or block ip address where emails are coming from at firewall.
    • Who's My Spammer?
    • Continue to monitor compromised account and block ip addresses:
      • tail -f /var/log/zimbra.log | grep username | grep sasl
        • Jun 8 18:14:10 mail postfix/smtpd[15794]: 004358EEB16: client=unknown[XXXX.236.197.216], sasl_method=LOGIN, sasl_username=username@domain
  • Step 5: Disable the exploited email account, expire auth session, etc.
  • Step 6: Move the mail queue or delete the spam email
  • Step 7: Release Mail queue

Who's My Spammer?

Getting Some Initial Summary Data
zmdialyreport

First, some notable bug/RFE's in regards to the zmdailyreport:

You can first get some summary data by doing the following:

[zimbra@zcs806 ~]$ /opt/zimbra/libexec/zmdailyreport

Grand Totals
------------
messages

      7   received
     11   delivered
      0   forwarded
      0   deferred
      0   bounced
      3   rejected (21%)
      0   reject warnings
      0   held
      0   discarded (0%)

   2780   bytes received
  10914   bytes delivered
      2   senders
      1   sending hosts/domains
      1   recipients
      1   recipient hosts/domains


Per-Hour Traffic Summary
    time          received  delivered   deferred    bounced     rejected
    --------------------------------------------------------------------
    0000-0100           0          0          0          0          0
    0100-0200           1          3          0          0          0
    0200-0300           0          0          0          0          0
    0300-0400           0          0          0          0          0
    0400-0500           0          0          0          0          0
    0500-0600           0          0          0          0          0
    0600-0700           0          0          0          0          0
    0700-0800           1          0          0          0          2
    0800-0900           1          0          0          0          0
    0900-1000           0          0          0          0          1
    1000-1100           0          0          0          0          0
    1100-1200           0          0          0          0          0
    1200-1300           4          8          0          0          0
    1300-1400           0          0          0          0          0
    1400-1500           0          0          0          0          0
    1500-1600           0          0          0          0          0
    1600-1700           0          0          0          0          0
    1700-1800           0          0          0          0          0
    1800-1900           0          0          0          0          0
    1900-2000           0          0          0          0          0
    2000-2100           0          0          0          0          0
    2100-2200           0          0          0          0          0
    2200-2300           0          0          0          0          0
    2300-2400           0          0          0          0          0

Host/Domain Summary: Message Delivery (top 50)
 sent cnt  bytes   defers   avg dly max dly host/domain
 -------- -------  -------  ------- ------- -----------
     11    10914        0     7.4 s   24.0 s  zcs806.DOMAIN.com

Host/Domain Summary: Messages Received (top 50)
 msg cnt   bytes   host/domain
 -------- -------  -----------
      5     2780   zcs806.DOMAIN.com

top 50 Senders by message count
-------------------------------
      4   zimbra@zcs806.DOMAIN.com
      1   admin@zcs806.DOMAIN.com

top 50 Recipients by message count
----------------------------------
     11   admin@zcs806.DOMAIN.com

top 50 Senders by message size
------------------------------
   1974   zimbra@zcs806.DOMAIN.com
    806   admin@zcs806.DOMAIN.com

top 50 Recipients by message size
---------------------------------
  10914   admin@zcs806.DOMAIN.com

message deferral detail: none

message bounce detail (by relay): none

message reject detail
---------------------
  MAIL
    5.3.4 Message size exceeds fixed limit (total: 3)
           3   domain-ext.com

message reject warning detail: none

message hold detail: none

message discard detail: none

smtp delivery failures: none

Warnings
--------
  sendmail (total: 3)
         1   or the command is run from a set-uid root process
         1   the Postfix sendmail command has set-uid root file permissions
         1   the Postfix sendmail command must be installed without set-uid ...
  smtpd (total: 1)
         1   7A735345A: queue file size limit exceeded

Fatal Errors: none

Panics: none

Master daemon messages: none
client_usage_report.py

This will give some stats on your mail activity. Note, there are some issue with this script double reporting mail counts etc, but it's useful to identify the top 50 for activity.

[zimbra@zcs806 ~]$ /opt/zimbra/libexec/client_usage_report.py
Reading /opt/zimbra/log/access_log.2014-04-17 ..
Reading /opt/zimbra/log/access_log.2014-04-18 ..
Reading /opt/zimbra/log/access_log.2014-04-19 ..
Reading /opt/zimbra/log/access_log.2014-04-20 ..
Reading /opt/zimbra/log/access_log.2014-04-21 ..
Reading /opt/zimbra/log/access_log.2014-04-22 ..
Reading /opt/zimbra/log/access_log.2014-04-23 ..
Writing /opt/zimbra/zmstat/client_usage_report_2014-04-24.csv ..

Then review the file it will create , it will give : "user_agent","client_IP","req_count"

[zimbra@zcs806 ~]$ cat /opt/zimbra/zmstat/client_usage_report_2014-04-24.csv
"user_agent","client_IP","req_count"
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:28.0) Gecko/20100101 Firefox/28.0","192.168.1.166","14"
"Mozilla/5.0 (Windows NT 6.2; WOW64; rv:28.0) Gecko/20100101 Firefox/28.0","192.168.1.166","93"
"Mozilla/5.0 (Windows NT 6.1; WOW64; rv:28.0) Gecko/20100101 Firefox/28.0","192.168.1.174","6"
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:28.0) Gecko/20100101 Firefox/28.0","192.168.1.166","71"
qshape

You can also look at the results of [qshape] - the default is the active queue. For more on qshape, see [Postfix Qshape Readme] .

qshape deferred
               T  5 10 20 40 80 160 320 640 1280 1280+
        TOTAL 12  0  0  0  0  0   0   0   0    0     12
    gmail.com  9  0  0  0  0  0   0   0   0    0     9
    yahoo.com  3  0  0  0  0  0   0   0   0    0     3
3rd Party Log Reports - postfix-logwatch and amavis-logwatch

Created RFE for us to include these in ZCS:

You can download them from http://logreporters.sourceforge.net/ . It's a fairly simply install, download and then extract - cd into extracted directory and as root type :

make install-standalone

They will install to /usr/local/bin/amavis-logwatch & postfix-logwatch . The config files are in /usr/local/etc/amavis-logwatch.conf & postfix-logwatch.conf . Here's an example of the output.

/usr/local/bin/amavis-logwatch output example:

[root@zcs806 amavis-logwatch-1.51.02]# /usr/local/bin/amavis-logwatch /var/log/zimbra.log
****** Summary *************************************************************************************

       4   Total messages scanned ------------------  100.00%
   1.926K  Total bytes scanned                          1,972
========   ==================================================

       4   Passed ----------------------------------  100.00%
       4     Clean passed                             100.00%
========   ==================================================

       4   Ham -------------------------------------  100.00%
       4     Clean passed                             100.00%
========   ==================================================


==================================================================================
Spam Score Percentiles        0%       50%       90%       95%       98%      100%
----------------------------------------------------------------------------------
Score Ham (4)             -1.900    -1.900    -1.900    -1.900    -1.900    -1.900
==================================================================================

======================================================================================================
Spam Score Frequency      <= -10     <= -5      <= 0      <= 5     <= 10     <= 20     <= 30      > 30
------------------------------------------------------------------------------------------------------
Hits (4)                       0         0         4         0         0         0         0         0
Percent of Hits            0.00%     0.00%   100.00%     0.00%     0.00%     0.00%     0.00%     0.00%
======================================================================================================

/usr/local/bin/postfix-logwatch output example:

[root@zcs806 amavis-logwatch-1.51.02]# /usr/local/bin/postfix-logwatch /var/log/zimbra.log

****** Summary *************************************************************************************

       1   *Warning: Queue file size limit exceeded

   6.512K  Bytes accepted                               6,668
   1.928K  Bytes sent via SMTP                          1,974
   4.584K  Bytes sent via LMTP                          4,694
========   ==================================================

      10   Accepted                                    76.92%
       3   Rejected                                    23.08%
--------   --------------------------------------------------
      13   Total                                      100.00%
========   ==================================================

       3   5xx Reject message size                    100.00%
--------   --------------------------------------------------
       3   Total 5xx Rejects                          100.00%
========   ==================================================

      10   Connections
      10   Disconnections
       8   Removed from queue
       4   Sent via SMTP
       4   Sent via LMTP
       4   Filtered

****** Detail (10) *********************************************************************************

       3   5xx Reject message size -----------------------------------------------------------------
       3      192.168.1.166     remote.domain.com
       3         *unavailable
       3            *unavailable

       4   Sent via SMTP ---------------------------------------------------------------------------
       4      zcs806.DOMAIN.com

       4   Sent via LMTP ---------------------------------------------------------------------------
       4      zcs806.DOMAIN.com

       4   Filtered --------------------------------------------------------------------------------
       2      smtp-amavis:[127.0.0.1]:10024
       2         Sender address
       1            admin@zcs806.DOMAIN.com
       1               admin@zcs806.DOMAIN.com
       1                  192.168.1.166     remote.domain.com
       1            user@DOMAIN.com
       1               admin@zcs806.DOMAIN.com
       1                  192.168.1.184     remote2.domain.com
       2      smtp-amavis:[127.0.0.1]:10026
       2         Sender address
       1            admin@zcs806.DOMAIN.com
       1               admin@zcs806.DOMAIN.com
       1                  192.168.1.166     remote.domain.com
       1            user@DOMAIN.com
       1               admin@zcs806.DOMAIN.com
       1                  192.168.1.184     remote2.domain.com

=== Delivery Delays Percentiles ============================================================
                    0%       25%       50%       75%       90%       95%       98%      100%
--------------------------------------------------------------------------------------------
Before qmgr       0.04      0.09      0.11      0.11      0.23      0.35      0.43      0.48
In qmgr           0.00      0.00      0.01      0.01      0.04      0.07      0.08      0.09
Conn setup        0.00      0.01      0.29      1.30      2.05      2.23      2.33      2.40
Transmission      0.10      2.81      4.85      9.60     21.00     21.00     21.00     21.00
Total             0.20      2.91      5.20     11.00     23.30     23.65     23.86     24.00
============================================================================================

Note - First, look at the options each command has using the -h output. You might want to use --full when doing an investigation and also include a wildcard - /var/log/zimbra.lo* to take in all the log data. For example:

[zimbra@zcs806 ~]$ /usr/local/bin/postfix-logwatch --full /var/log/zimbra.lo*
****** Summary *************************************************************************************

       9   *Fatal:   General fatal
       1   *Warning: Queue file size limit exceeded
      21   Miscellaneous warnings

 710.888K  Bytes accepted                             727,949
 193.036K  Bytes sent via SMTP                        197,669
 520.114K  Bytes sent via LMTP                        532,597
========   ==================================================

    1041   Accepted                                    99.71%
       3   Rejected                                     0.29%
--------   --------------------------------------------------
    1044   Total                                      100.00%
========   ==================================================

       3   5xx Reject message size                    100.00%
--------   --------------------------------------------------
       3   Total 5xx Rejects                          100.00%
========   ==================================================

      65   Connections
      65   Disconnections
    1041   Removed from queue
     523   Sent via SMTP
     517   Sent via LMTP
       2   Bounced (local)
       1   Bounced (remote)
       9   Filtered
       2   Notifications sent

       4   Timeouts (inbound)
       1   PIX workaround enabled

****** Detail (10) *********************************************************************************

       9   *Fatal:   General fatal -----------------------------------------------------------------
       3      Queue report unavailable - mail system is down
       3      Usage: sendmail [options]
       2      The Postfix mail system is not running
       1      Usage: send-mail [options]

      21   Miscellaneous warnings ------------------------------------------------------------------
       7      or the command is run from a set-uid root process
       7      the Postfix sendmail command has set-uid root file permissions
       7      the Postfix sendmail command must be installed without set-uid root file permissions

       3   5xx Reject message size -----------------------------------------------------------------
       3      10.X.X.166     fence.DOMAIN.com
       3         *unavailable
       3            *unavailable

     523   Sent via SMTP ---------------------------------------------------------------------------
     507      86.lab
      15      zcs806.DOMAIN.com
       1      domaina.com

     517   Sent via LMTP ---------------------------------------------------------------------------
     507      86.lab
      10      zcs806.DOMAIN.com

       2   Bounced (local) -------------------------------------------------------------------------
       2      5.0.0: Permanent failure: Other/Undefined status: Other undefined status
       2         zcs806.DOMAIN.com
       2            Zcs806.DOMAIN.com
       1               subject:test
       1               zimbra

       1   Bounced (remote) ------------------------------------------------------------------------
       1      5.0.0: Permanent failure: Other/Undefined status: Other undefined status
       1         domain.com
       1            user
       1               64.X.X.28      sentry.DOMAIN.com
       1                  505 5.0.0 Unknown recipient: RCPT TO

       9   Filtered --------------------------------------------------------------------------------
       7      smtp-amavis:[127.0.0.1]:10026
       7         Sender address
       3            admin@zcs806.DOMAIN.com
       3               admin@zcs806.DOMAIN.com
       2                  10.X.X.36     zcs806.DOMAIN.com
       1                  10.X.X.166     gatewayXX.DOMAIN.com
       2            zimbra@zcs806.DOMAIN.com
       2               admin@zcs806.DOMAIN.com
       2                  10.X.X.36     zcs806.DOMAIN.com
       1            ajcody@DOMAIN.com
       1               admin@zcs806.DOMAIN.com
       1                  10.X.X.184     edgeXX.DOMAIN.com
       1            san5@zcs806.DOMAIN.com
       1               b@zcs806.DOMAIN.com
       1                  10.X.X.36     zcs806.DOMAIN.com
       2      smtp-amavis:[127.0.0.1]:10024
       2         Sender address
       1            admin@zcs806.DOMAIN.com
       1               admin@zcs806.DOMAIN.com
       1                  10.X.X.166     gatewayXX.DOMAIN.com
       1            ajcody@DOMAIN.com
       1               admin@zcs806.DOMAIN.com
       1                  10.X.X.184     edgeXX.DOMAIN.com

       2   Notifications sent ----------------------------------------------------------------------
       2      Non-delivery
       2         sender

       4   Timeouts (inbound) ----------------------------------------------------------------------
       4      After END-OF-MESSAGE

       1   PIX workaround enabled ------------------------------------------------------------------
       1      disable_esmtp delay_dotcrlf
       1         64.X.X.28      sentry.DOMAIN.com

=== Delivery Delays Percentiles ============================================================
                    0%       25%       50%       75%       90%       95%       98%      100%
--------------------------------------------------------------------------------------------
Before qmgr       0.01      0.03      0.06      0.14      0.27      0.34      0.48      2.60
In qmgr           0.00      0.00      0.08    117.50    193.00    216.00    231.48    246.00
Conn setup        0.00      0.00      0.00      0.00      0.02      0.04      0.22     20.00
Transmission      0.05      0.09      3.60      9.80     10.00     10.00     11.00    160.00
Total             0.07      0.13      3.80    129.00    203.00    226.00    241.64    259.00
============================================================================================
zmaccts

One way to note accounts that are actively logging in vs. those that aren't, can help shrink the number of accounts you might want to investigate or monitor. [example below, I cut out a lot of the accounts]

           account                          status             created       last logon
------------------------------------   -----------     ---------------  ---------------
zcstest001@zcs806.DOMAIN.com                active      01/20/14 18:47   03/02/14 21:11
zcstest002@zcs806.DOMAIN.com                active      01/30/14 01:48   02/19/14 00:07
admin-20140415@zcs806.DOMAIN.com            active      04/15/14 14:42            never
archtest-prod-20140402@zcs806.DOMAIN        active      04/02/14 07:42            never

           account                          status             created       last logon
------------------------------------   -----------     ---------------  ---------------
bruce@test1.lab                             active      02/22/14 09:32            never
test.cal@test1.lab                          active      04/06/14 05:35   04/06/14 05:35
test200@test1.lab                           active      04/12/14 00:50            never

                                 domain summary

    domain                  active    closed    locked    maintenance     total
-----------------------   --------  --------  --------  -------------  --------
test1.lab                        3         0         0              0         3
test2.com                        2         0         0              0         2
angad.com                        2         0         0              0         2
test.test                        3         0         0              0         3
test.DOMAIN.com                  6         0         0              0         6
zcs806.DOMAIN.com               58         0         0              0        58
zcs806.DOMAIN.com                2         0         0              0         2
By Authentication Attempts

A fast way to see who is doing a lot of authentications, which normally happens when a spammer has compromised an account with a weak password, is to do:

# cat /var/log/zimbra.log | sed -n 's/.*sasl_username=//p' | sort | uniq -c | sort -n
      1 Auser@domain.com
      3 Buser@domain.com
      4 Cuser@domain.com
      5 Duser@domain.com
     36 SPAMMER@domain.com

Note - This might take a long time, if so - try pruning it down

Example:

# cat /var/log/zimbra.log | grep sasl_username > /tmp/zimbra_sasl_username.txt
# cat /tmp/zimbra_sasl_username.txt | sed -n 's/.*sasl_username=//p' | sort | uniq -c | sort -n
      1 Auser@domain.com
      3 Buser@domain.com
      4 Cuser@domain.com
      5 Duser@domain.com
     36 SPAMMER@domain.com

The full log event will look like this:

zimbra1 postfix/smtpd[29431]: B28914D5978: client=xxxxx.server.com[w.x.y.z], sasl_method=LOGIN, sasl_username=user
zimbra1 postfix/cleanup[5522]: B28914D5978: message-id=<20090420154255.B28914D5978@zimbraserver.com>
zimbra1 postfix/qmgr[20690]: B28914D5978: from=<spam@spam.com>, size=6026, nrcpt=10 (queue active)
zimbra1 postfix/cleanup[3983]: 2BA56465D28: message-id=<20090420154255.B28914D5978@zimbraserver.com>

Against your older logs, you could:

# zcat /var/log/zimbra.log* | sed -n 's/.*sasl_username=//p' | sort | uniq -c | sort -n

And you can look at the specific information for the user in question with:

# grep -C2 "sasl_username=SPAMMER@domain.com" /var/log/zimbra.log

Or if searching against the older logs:

# zgrep -C2 "sasl_username=SPAMMER@domain.com" /var/log/zimbra.log*

If you want to check on a specific message ID, do:

grep 9DF7520804A /var/log/zimbra.log*

For older message logs:

zgrep 9DF7520804A /var/log/zimbra.log*

To read/view the message in the queue:

/opt/zimbra/postfix/sbin/postcat -q 9DF7520804A 

One would then normally lock/change password on the one account showing the most activity. Grep'ing the /var/log/zimbra.log with the username in question will also show the ip address being used, this can be blocked with your firewall.

To be alerted of a compromised account and have it lock automatically see below. Slightly modified from this reference : http://www.zimbra.com/forums/administrators/62613-identify-compromised-accounts.html#post278732 :


#!/bin/bash
# checks log file and gets a count of authentications sent per minute, per user
# and if the count exceeds the maxmails value the user's account is locked.

logfile="/var/log/zimbra.log"
maxmails="10"
mydomain="example.com"
support="<postmaster-userid>@$mydomain"
accounts="/tmp/active_accounts"

su zimbra -c "/opt/zimbra/bin/zmaccts" | grep "@" | grep active | awk '{print $1}' > $accounts

zgrep -i "auth ok" $logfile | sed 's/  / /g' | awk -F"[ :]" '{print $3":"$4,$11;}' | uniq -c | sort -n | \
while read line
do
    count=`echo ${line} | cut -d' ' -f 1`
    userid=`echo ${line} | cut -d' ' -f 3`
    timestamp=`echo ${line} | cut -d' ' -f 2`
    active=`grep "$userid@$mydomain" $accounts`

    if [ "$count" -gt "$maxmails" ] && [ "$active" == "$userid@$mydomain" ]; then
        echo "Maximum email rate exceeded, $userid@$mydomain will be locked"
        su zimbra -c "/opt/zimbra/bin/zmprov ma $userid@$mydomain zimbraAccountStatus locked"
        subject="$userid account locked due to excessive connections"
        # Email text/message
        message="/tmp/emailmessage.txt"
        echo "$userid account has been locked as there were $count connections made at"> $message
        echo "$timestamp.  Please have the user change their password, and check for phishing" >>$message
        echo "emails if possible." >>$message
        # send an email using /bin/mail
        /usr/bin/mail -s "$subject" "$support" < $message
        rm -f $message

        #update list of active accounts
        su zimbra -c "/opt/zimbra/bin/zmaccts" | grep "@" | grep active | awk '{print $1}' > $accounts
    fi
done

rm -f $accounts

Then run it as a cron job. The frequency will depend on the number of accounts you're managing.

* * * * * /opt/zimbra/find_spammer.sh
By Connecting IP - Useful For Blocking IP At Firewall

See also the following:

To find the originating IP address of where the emails are coming from:

grep 'connect from' /var/log/zimbra.log | sed 's/.*connect from.*\[\(.[^]]*\)\]/\1/g' | sort | uniq -c | sort -nr | head

To check your older logs [example output below]:

zgrep 'connect from' /var/log/zimbra.log* | sed 's/.*connect from.*\[\(.[^]]*\)\]/\1/g' | sort | uniq -c | sort -nr | head
     36 10.137.xx.34
     34 127.0.0.1
Open Relay Check

You should also confirm you aren't an open relay.

$ host -t mx DOMAIN.com
DOMAIN.com mail is handled by 10 mail.DOMAIN.com.

$ telnet mail.DOMAIN.com 25
Trying 184.###.##.## ...
Connected to mail.DOMAIN.com.
Escape character is '^]'.
220 mail.DOMAIN.com ESMTP Postfix
helo support.test
250 mail.DOMAIN.com
mail from:<SPAMMER@domain.com>
250 2.1.0 Ok
rcpt to:<TEST@DOMAIN.COM>
554 5.7.1 <TEST@DOMAIN.COM>: Relay access denied

rcpt to:<SPAMMER@domain.com>
554 5.7.1 Service unavailable; Client host [71.XXX.XX.XX] blocked 
 using zen.spamhaus.org; http://www.spamhaus.org/query/bl?ip=71.202.XX.XX
quit
221 2.0.0 Bye
Connection closed by foreign host.
Telnet Test To Confirm/Show Authentication Required For SMTP/Port 25

This is an example:

esx2:~ ajcody$ telnet zcs723.EXAMPLE.com 25

Trying 10.137.27.32...
Connected to zcs723.EXAMPLE.com.
Escape character is '^]'.
220 zcs723.EXAMPLE.com ESMTP Postfix
helo zcs723.EXAMPLE.com   << I typed
250 zcs723.EXAMPLE.com
mail from:ajcody@zcs723.EXAMPLE.com   << I typed
250 2.1.0 Ok
rcpt to:ajcody2@zcs723.EXAMPLE.com   << I typed
553 5.7.1 <ajcody@zcs723.EXAMPLE.com>: Sender address rejected: not logged in

But note - if you do this from the ZCS server or a server that is within the ip range or has it's specific ip listed in the mynetworks, you will not get this authentication requirement.

[root@zcs723 ~]# telnet localhost 25
Trying ::1...
telnet: connect to address ::1: Connection refused
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 zcs723.EXAMPLE.com ESMTP Postfix
helo myworkstation
250 zcs723.EXAMPLE.com
ehlo myworkstation
250-zcs723.EXAMPLE.com
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-STARTTLS
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
mail from:<ajcody@zcs723.EXAMPLE.com>
250 2.1.0 Ok
rcpt to: <ajcody2@zcs723.EXAMPLE.com>
250 2.1.5 Ok
data
354 End data with <CR><LF>.<CR><LF>
From: Adam <ajcody@zcs723.EXAMPLE.com>
To: Adam 2 <ajcody2@zcs723.EXAMPLE.com>
Subject: From Localhost - NOT Auth
test
.
250 2.0.0 Ok: queued as 8B19E1E78D1
quit
221 2.0.0 Bye
Connection closed by foreign host.

Resources

A list of resources you'll find useful:

Wiki articles that have been assigned to the anit-spam category:

Down to the end-user:

External Relay Test Pages
  • http://www.checkor.com/
    • Note - this test is in regards to the From spoofing spammers sometimes do for DL's.
    • Also, for the test - make an account/DL on your system for test1@[your domain] . Otherwise you'll just error about account not existing.
RSET
250 2.0.0 Ok
MAIL FROM: spam@mail59.DOMAIN.com
250 2.1.0 Ok
RCPT TO: test1@mail59.DOMAIN.com
Test Failed, 250 2.1.5 Ok 

Blocking MAIL FROM - smtpd_sender_restrictions - Default Is Empty

External References
Zimbra References And Bugs & RFE's
Protecting DL's From Spammers - Forging Mail From
First Recommendation - As Given By Dev's From Critical Meeting Notes

  • Enabled SASL/SMTP Authentication
  • Implement how-to as described in :
    • Permitted Senders: RestrictPostfixRecipients
      • Note: You'll see on the above page a reference to the spoof hole.
        • "This method can be spoofed by forging the MAIL FROM: header (so mail appears to originate from within the domain), so it isn't foolproof, but it works for basic needs."
      • Note: You'll also modify the instructions as above with addition details provided below.
  • Force authentication for local-domain senders:
    • modify the main.cf to have the following:
      • smtpd_sender_restrictions = check_sender_access hash:/path/to/file
    • Then for the /path/to/file that you used in the mail.cf for smtpd_sender_restrictions, you'll have a line like:
      • example.com permit_sasl_authenticated, reject
Second Recommendation - Unpredictable DL name or Non-routing Domain

Do not use predictable DL names. Instead of using everyone@company.com , use something like everyone-[random-string]@company.com .

Another option is to use a non-routing domain - company.local - and setup your DL's there. You'll want to configure your main domain to be able to query the GAL of this domain.

To see the existing setting:

zmprov gd [domainname] zimbraGalLdapSearchBase

To change the variable for the domain:

zmprov md [domainname] zimbraGalInternalSearchBase ROOT
Third Recommendation - Using smtpd_sender_restrictions

Work In Progress. I'm testing this now. Please don't attempt until this line is removed.

Update: See the following:

This should work if your "clients" are using ZWC, ZCO, or ActiveSync mobile devices. If you are using IMAP/POP + STMP thick clients, you'll most likely have to enable smtp authentication [sasl] and use the reject_authenticated_sender_login_mismatch variable instead.

postconf -e smtpd_sender_restrictions=reject_sender_login_mismatch
postfix reload

This option is described as:

reject_sender_login_mismatch
Reject the request when $smtpd_sender_login_maps specifies an owner for the MAIL FROM address, but the client is not (SASL) logged in as that MAIL FROM address owner; or when the client is (SASL) logged in, but the client login name doesn't own the MAIL FROM address according to $smtpd_sender_login_maps. Man page

Some Other SMTP Sending Restrictions

Blocking Incoming From Domain And By User

See the following:

check_client_access

The smtpd_client_restrictions parameter restricts what clients this system accepts SMTP connections from. The default behavior is to allow SMTP connections from any client. This is discussed under Spam Controls on the Postfix site.

Example:

check_client_access regexp:/etc/postfix/access_sender_client_server,

Example:

check_sender_access regexp:/etc/postfix/access_sender_toplevel
smtpd_reject_unlisted_sender

Details can be found on the mail.cf Postfix page.

Example:

smtpd_reject_unlisted_sender = yes

Possible Bug:

http://bugzilla.zimbra.com/show_bug.cgi?id=24889

What's Your SPF Records Say, When Getting "does not designate 74.x.x.x as permitted sender Errors"

This is most likely related to the SPF records for your domain and what the header content of the sending email states as it's Mail From. For example, this is from the header of an email that was "received":

Received: from mail.XYZ-FAKE.com (mailhost.XYZ-FAKE.com [74.X.X.244]) by mta01.ABC-FAKE.com with ESMTP id 
Cft0mO3fjlFGQjTA for <support@ABC-FAKE.com>; Tue, 21 Apr 2009 05:14:13 -0700 (PDT)
X-Barracuda-Envelope-From: testuser@XYZ-FAKE.com
Received-SPF: pass (mta01.ABC-FAKE.com: domain of testuser@XYZ-FAKE.com designates 74.X.X.244 as permitted sender) 
receiver=mta01.ABC-FAKE.com; client_ip=74.X.X.244; envelope-from=testuser@XYZ-FAKE.com;

To see what this check was done against, do the following below. I'll trim the output and adjust the information used to protect the innocent. Also, notice how a DNS "alias" might cause an issue here? :


$ host 74.X.X.244
244.X.X.74.in-addr.arpa domain name pointer mailhost.XYZ-FAKE.com.

$ host mailhost.XYZ-FAKE.com
mailhost.XYZ-FAKE.com has address 74.X.X.244

$ host mail.XYZ-FAKE.com
mail.XYZ-FAKE.com is an alias for mailhost.XYZ-FAKE.com.
mailhost.XYZ-FAKE.com has address 74.X.X.244

$ dig XYZ-FAKE.com MX

;; QUESTION SECTION:
;XYZ-FAKE.com.			IN	MX

;; ANSWER SECTION:
XYZ-FAKE.com.		3600	IN	MX	22 serverA.DNS-FAKE.com.
XYZ-FAKE.com.		3600	IN	MX	11 serverB.DNS-FAKE.com.

$ dig XYZ-FAKE.com TXT

;; QUESTION SECTION:
;XYZ-FAKE.com.			IN	TXT

;; ANSWER SECTION:
XYZ-FAKE.com.		3600	IN	TXT	"v=spf1 a:mail.XYZ-FAKE.com ~all"

See the following for more information:

Using Different SMTP Server For Webclient (ZWC), Mobiles, And ZCO

Note Of Caution About Using External MTAs

Using non-zimbra MTA's can cause some options in zimbra to not function anymore - since it no longer has zimbra's mta services available.

Zimbra Mail Forwarding Possibly Will Not Work - Turn Off User Option To Set MailForwarding

Mail forwarding might no longer work depending on the configuration you setup regarding the use of your external mta's. When this happens you'll most likely want to disable the option for users to set a mail forwarding address in their preferences. This can be done via their COS or USER configuration.

  • In the admin console, goto the COS configuration the user/s are using and the "Features" tab. Uncheck the option "Allow the user to specify a forwarding address" under Mail Features. It is in the same location under a USERs configuration panel in the admin console.

In the CLI, you will see these set as the defaults for the default COS. The admin gui option above only adjusts the zimbraFeatureMailForwardingEnabled variable :

$ zmprov gc default | grep zimbraFeatureMailForwarding
    zimbraFeatureMailForwardingEnabled: TRUE
    zimbraFeatureMailForwardingInFiltersEnabled: TRUE
$ zmprov ga ajcody@`zmhostname` | grep zimbraFeatureMailForwarding
    zimbraFeatureMailForwardingEnabled: TRUE
    zimbraFeatureMailForwardingInFiltersEnabled: TRUE

More details about them are in the /opt/zimbra/conf/attrs/zimbra-attrs.xml file.

<attr id="342" name="zimbraFeatureMailForwardingEnabled" type="boolean" cardinality="single" 
 optionalIn="account,cos" flags="accountInfo,accountInherited,domainAdminModifiable">
  <defaultCOSValue>TRUE</defaultCOSValue>
  <desc>enable end-user mail forwarding features</desc>
</attr>

<attr id="704" name="zimbraFeatureMailForwardingInFiltersEnabled" type="boolean" 
 cardinality="single" optionalIn="account,cos" flags="accountInfo,accountInherited,
 domainAdminModifiable" since="5.0.10">
  <defaultCOSValue>TRUE</defaultCOSValue>
  <desc>enable end-user mail forwarding defined in mail filters features</desc>
</attr>
Configure External MTA To Use LDAP Virtual Alias Maps

Here's the basic info in regards to how Zimbra's mta [postfix/etc] uses Zimbra's LDAP to get the forwarding information:

$ grep Forward conf/ldap-*
conf/ldap-vam.cf:result_attribute =  
zimbraMailDeliveryAddress,zimbraMailForwardingAddress,
zimbraPrefMailForwardingAddress,zimbraMailCatchAllForwardingAddress
$ postconf |grep vam
virtual_alias_maps = proxy:ldap:/opt/zimbra/conf/ldap-vam.cf

See http://www.postfix.org/postconf.5.html#virtual_alias_maps for more information.

Confirming And Setting zimbraMtaRelayHost And zimbraMtaDnsLookupsEnabled

First we'll set zimbraMtaRelayHost and zimbraMtaDnsLookupsEnabled variables. These options are also shown in the admin console and can be configured there. These variable alone will not redirect ALL traffic to an external MTA first though. There's alao a variable called zimbraSmtpHostname that is in the global (zmprov gacf) and server (zmprov gs `hostname`) configs - addressed in the section below. It's defaulted value is 'localhost' - at least on a single ZCS configuration.

In situations where you need/want all mail to be processed by, for example, an external non-Zimbra spam filter box you could set this variable to the spam filter servers hostname.

Normally, when zimbraMtaRelayHost is set to a non-zimbra external MTA would disable DNS lookups. If you disable DNS Lookups (under the MTA tab of the admin console, or with zmprov), Zimbra will end up using (according to the postconf man page) the "gethostbyname() system library routine which normally also looks in /etc/hosts" (based on the entries on the "hosts" line in /etc/nsswitch.conf). If you do this but don't also specify an SMTP relay host (typically your ISP's SMTP server), which will take care of checking DNS, you will reverse your ability to send mail: suddenly you can send mail to other users on the Zimbra server, but you can't send to the internet (though you can still receive mail from the internet either way).

Query Global - `zmhostname` would use the value returned, you can manual type out the servername as well :

zmprov gacf zimbraMtaRelayHost
zmprov gacf zimbraMtaDnsLookupsEnabled

Query Per Server - `zmhostname` would use the value returned, you can manual type out the servername as well :

zmprov gs `zmhostname` zimbraMtaRelayHost
zmprov gs `zmhostname` zimbraMtaDnsLookupsEnabled

Note - if you get errors about doing the query on your non-mailstores like, "ERROR: zclient.IO_ERROR (invoke Connection refused, server: localhost) (cause: java.net.ConnectException Connection refused)" then you might need to adjust this variable. First query it, it's most likely set to localhost

zmlocalconfig zimbra_zmprov_default_soap_server

If you had the error and it was set to localhost, modify it to be one of your mailstores.

zmlocalconfig -e zimbra_zmprov_default_soap_server=mailstore.example.com

No restart of anything is needed, the zmprov query should now work.

Modify Global - `zmhostname` would use the value returned, you can manual type out the servername as well :

zmprov mcf zimbraMtaRelayHost hostname-of-ext-server:PORT
 ** ex : zmprov mcf zimbraMtaRelayHost primary.YYY.state.XX.us:25
 ** At the end, 25 is the port number for smtp on the targeted system. 
 ** Adjust this number if you changed the smtp port.
zmprov mcf zimbraMtaDnsLookupsEnabled FALSE

Modify Per Server - `zmhostname` would use the value returned, you can manual type out the servername as well :

zmprov ms `zmhostname` zimbraMtaRelayHost hostname-of-ext-server:PORT
 ** ex : zmprov ms `zmhostname` zimbraMtaRelayHost primary.YYY.state.XX.us:25
 ** At the end, 25 is the port number for smtp on the targeted system. 
 ** Adjust this number if you changed the smtp port.
zmprov ms `zmhostname` zimbraMtaDnsLookupsEnabled FALSE

Confirming And Setting zimbraSmtpHostname

I'm assuming you already set, zimbraMtaRelayHost and zimbraMtaDnsLookupsEnabled for your needs - see above section. The variable called zimbraSmtpHostname is in the global (zmprov gacf) and server (zmprov gs `hostname`) configs. It's default value is set to 'localhost' - at least on a single ZCS configuration.

In cases where you need/want all mail to be processed by, for example, an external non-Zimbra spam filter box you could set this variable to the spam filter boxes hostname.

Query Global - `zmhostname` would use the value returned, you can manual type out the servername as well :

zmprov gacf zimbraSmtpHostname

Query Per Server - `zmhostname` would use the value returned, you can manual type out the servername as well :

zmprov gs `zmhostname` zimbraSmtpHostname

Note - if you get errors about doing the query on your non-mailstores like, "ERROR: zclient.IO_ERROR (invoke Connection refused, server: localhost) (cause: java.net.ConnectException Connection refused)" then you might need to adjust this variable. First query it, it's most likely set to localhost

zmlocalconfig zimbra_zmprov_default_soap_server

If you had the error and it was set to localhost, modify it to be one of your mailstores.

zmlocalconfig -e zimbra_zmprov_default_soap_server=mailstore.example.com

No restart of anything is needed, the zmprov query should now work.

Modify Global - `zmhostname` would use the value returned, you can manual type out the servername as well :

zmprov mcf zimbraSmtpHostname hostname-of-ext-server
 ** ex : zmprov mcf zimbraSmtpHostname primary.YYY.state.XX.us

Modify Per Server - `zmhostname` would use the value returned, you can manual type out the servername as well :

zmprov ms `zmhostname` zimbraSmtpHostname hostname-of-ext-server
 ** ex : zmprov ms `zmhostname` zimbraSmtpHostname primary.YYY.state.XX.us

External Email Clients Setting A SMTP Server

The above variable, zimbraSmtpHostname, will not alter your third party email clients that are setting the smtp server to your ZCS mta's. Here are your options if you also need to have that traffic to go through another device [mta, spam filter, etc.] prior to local delivery [lmtp] to an internal address.

  • Set your clients to use the another devices ip address or hostname that you set for zimbraSmtpHostname.

If you can't do the above, for whatever reason -- maybe security constraints or issues that might arise being a hosting provider, then see below.

  1. You could investigate the alternation of postfix's content_filter option to place the external device/host [a barracuda for example] within that process. postfix.org has information on this - Postfix After-Queue Content Filter. This would be unsupported by Zimbra.
  2. Contact Zimbra's Professional Services [PS] team for help.
  3. Setup another server using a mta of your choice [postfix , sendmail] that the clients can use for the smtp server variable. This "new" mta would then simply relay to the device - a barracuda box for example. The barracuda would then do what it needs to and then forwards the messages to the appropriate servers for delivery. Your ZCS mta's in the case of local delivery that would of normally occurred over lmtp - userA@domainC.com sending to userB@domainC.com .

Global Or System Wide Filters

There is no "supported" solution for this - depending on the exact circumstances. It's a complex issue because each request for "global filters" tends to be very specific on either what's to be filter, what actions are to be taken, and so forth.

RFE's Related To Global Filters

Use The Legal Intercept Method

Depending on the details of your request, using the Legal Intercept options might be useful. You could take the results that goto the LI mailbox and then perform your admin global searches against your mailbox accounts to take the appropriate action.

See Legal_Intercept

Sieve Filter Set For Every Account

One could setup a forloop for all of your users and setup a sieve filter. Downside here is the rules are editable by the users and you would have to manage the rules for new accounts going forward.

See User_Migration#Migrating_Sieve_Filter_Rules for details.

Double Check The Current Anti-Spam Options

Make sure your request can't be solved by the current solutions described in articles.

Postfix , Amavis Customizations

I've seen some posts on the forums that customers found their own workarounds by customizing postfix and amavis. This will most likely result in an unsupported situation. Unfortunately, those forum posts don't also include details that I can share here. Hopefully I can find them going forward and I'll post them here.

Global Disclaimer Options

Here's the url to review for a "current" possibility:

And in the notes section there's a comment about multi-servers:

Please note though, "This article is a community contribution and may include unsupported customizations." Meaning, it's an unsupported customization, so please take the necessary precautions.

In regards to an official and supported way to do this, please review this RFE:

Quota Issues

Where To Adjust Message User Gets When They Are Over Quota

Moved to How_To_Adjust_The_Over_Quota_Message_The_User_Receives

See Current User Qoutas

Moved to Getting_All_Users_Quota_Data

Controlling Behavior For Messages Sent To Over Quota Mailbox - LMTP

Moved to Controlling_Behavior_For_Messages_Sent_To_Over_Quota_Mailbox_-_LMTP

Controlling Behavior For Messages Sent To Over Quota Mailbox - SMTP

Moved to Controlling_Behavior_For_Messages_Sent_To_Over_Quota_Mailbox_-_SMTP

Message Senders Receive About Mailbox Over Quota

Moved to Message_Senders_Receive_About_Mailbox_Over_Quota

Quota Not Showing In Admin Console - After ZCS Upgrade

Moved to Quota_Not_Showing_In_Admin_Console_-_After_ZCS_Upgrade

Managing Postfix Queue

Moved to Managing_The_Postfix_Queues#Managing_The_Postfix_Queues

Postfix, Amavis, Clamav Spool Directory Paths And Names

Moved to Managing_The_Postfix_Queues#Postfix.2C_Amavis.2C_Clamav_Spool_Directory_Paths_And_Names

Stop And Starting Postfix And Mta

Moved to Managing_The_Postfix_Queues#Stop_And_Starting_Postfix_And_Mta

To See Postfix Queue

Moved to Managing_The_Postfix_Queues#To_See_The_Postfix_Queues

Qshape - Print Postfix queue domain and age distribution

Moved to Managing_The_Postfix_Queues#Qshape_-_Print_Postfix_queue_domain_and_age_distribution

To View A Message In The Queue

Moved to Managing_The_Postfix_Queues#To_View_A_Message_In_The_Queue

To Flush Postfix Queue

Moved to Managing_The_Postfix_Queues#To_Flush_Postfix_Queue

To Requeue Messages In Postfix

Moved to Managing_The_Postfix_Queues#To_Requeue_Messages_In_Postfix

To Put Messages On Hold

Moved to Managing_The_Postfix_Queues#To_Put_Messages_On_Hold

To Delete Messages From Queue

Moved to Managing_The_Postfix_Queues#To_Delete_Messages_From_Queue

Cautionary Note

Moved to Managing_The_Postfix_Queues#Cautionary_Note

Relevant Sections Of Postsuper Man Page

Moved to Managing_The_Postfix_Queues#Relevant_Sections_Of_Postsuper_Man_Page

To Delete Single Message From Queue

Moved to Managing_The_Postfix_Queues#To_Delete_Single_Message_From_Queue

To Delete ALL Messages From Queue

Moved to Managing_The_Postfix_Queues#To_Delete_ALL_Messages_From_Queue

To Delete ALL Messages From The Deferred Queue

Moved to Managing_The_Postfix_Queues#To_Delete_ALL_Messages_From_The_Deferred_Queue

To Delete ALL Messages From The Hold Queue

Moved to Managing_The_Postfix_Queues#To_Delete_ALL_Messages_From_The_Hold_Queue

To Delete Many Messages From Queue

Moved to Managing_The_Postfix_Queues#To_Delete_Many_Messages_From_Queue

Delete From Queue By Email Address

Moved to Managing_The_Postfix_Queues#Delete_From_Queue_By_Email_Address

From CLI

Moved to Managing_The_Postfix_Queues#From_CLI

Script To Delete From Queue By Email Address

Moved to Managing_The_Postfix_Queues#Script_To_Delete_From_Queue_By_Email_Address

Script To Delete From Queue By Various Variable Targets

Moved to Managing_The_Postfix_Queues#Script_To_Delete_From_Queue_By_Various_Variable_Targets

Verified Against: Zimbra Collaboration 8.0, 7.0 Date Created: 04/16/2014
Article ID: https://wiki.zimbra.com/index.php?title=Ajcody-MTA-Postfix-Topics Date Modified: 2016-06-20



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