Domain level blocking of users: Difference between revisions

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{{ZC}}{{Article Infobox|{{admin}}|{{ZCS 7.0}}|{{ZCS 8.0}}|||}}
{{ZC}}{{Article Infobox|{{admin}}|{{ZCS 7.0}}|{{ZCS 8.0}}|||}}
Below mentioned are the steps to "REJECT" an external email address from sending mail to the users of the Zimbra Domain.
Below mentioned are the steps to "REJECT" an external email address from sending mail to the users of the Zimbra Domain.
See also https://bugzilla.zimbra.com/show_bug.cgi?id=96958


The same results can also be achieved using Amavis via [http://wiki.zimbra.com/index.php?title=Improving_Anti-spam_system#Implementing_Whitelist.2FBlacklist blacklisting].
The same results can also be achieved using Amavis via [http://wiki.zimbra.com/index.php?title=Improving_Anti-spam_system#Implementing_Whitelist.2FBlacklist blacklisting].
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  Create the postmap database as defined below
  Create the postmap database as defined below
  Modify '''/opt/zimbra/conf/zmconfigd/smtpd_sender_restrictions.cf''', by adding this as the second line of the file:
  Modify '''/opt/zimbra/conf/zmconfigd/smtpd_sender_restrictions.cf''', by adding this as the second line of the file:
  %%contains VAR:zimbraMtaSmtpdSenderRestrictions check_sender_access lmdb:/opt/zimbra/conf/postfix_reject_sender%%
%%contains VAR:zimbraMtaSmtpdSenderRestrictions check_sender_access lmdb:/opt/zimbra/conf/postfix_reject_sender%%
Then execute:
  zmprov ms <zmhostname> +zimbraMtaRestriction "client_sender_access lmdb:/opt/zimbra/postfix/conf/postfix_reject_sender"
  zmprov ms <zmhostname> +zimbraMtaRestriction "client_sender_access lmdb:/opt/zimbra/postfix/conf/postfix_reject_sender"



Revision as of 21:14, 5 March 2015

Admin Article

Article Information

This article applies to the following ZCS versions.

ZCS 7.0 Article ZCS 7.0 ZCS 8.0 Article ZCS 8.0


Below mentioned are the steps to "REJECT" an external email address from sending mail to the users of the Zimbra Domain.

See also https://bugzilla.zimbra.com/show_bug.cgi?id=96958

The same results can also be achieved using Amavis via blacklisting.

1. Set smtpd_sender_restrictions as appropriate for the version of ZCS

ZCS 7:
zmlocalconfig -e postfix_smtpd_sender_restrictions="hash:/opt/zimbra/conf/postfix_reject_sender"
ZCS 8:
Add "client_sender_access hash:/opt/zimbra/conf/postfix_reject_sender" as the first line of /opt/zimbra/conf/zmconfigd/smtpd_sender_restrictions.cf
ZCS 8.5 and 8.6:
Create the postmap database as defined below
Modify /opt/zimbra/conf/zmconfigd/smtpd_sender_restrictions.cf, by adding this as the second line of the file:
%%contains VAR:zimbraMtaSmtpdSenderRestrictions check_sender_access lmdb:/opt/zimbra/conf/postfix_reject_sender%%

Then execute:
zmprov ms <zmhostname> +zimbraMtaRestriction "client_sender_access lmdb:/opt/zimbra/postfix/conf/postfix_reject_sender"

2. Create file /opt/zimbra/conf/postfix_reject_sender with the list of email addresses and domains to be rejected in the below format:

  user@domain.com REJECT
  domainX.com REJECT

3. postmap it and restart postfix

 postmap /opt/zimbra/conf/postfix_reject_sender
 zmmtactl stop && zmmtactl start

You'll be able to see the changes show up in /opt/zimbra/log/zmconfigd.log .

Reject messages will be logged in /var/log/zimbra.log ; format looks like this:

[date / hostname] postfix/smtpd[####] NOQUEUE: reject: RCPT from [remote mta]: 554 5.7.1 <senders-email@DOMAIN>:
Sender address rejected: Access denied: from=<senders-email@DOMAIN> to=<local-zimbra-user@domain> proto=ESMTP helo=<remote mta>

The sender will receive a returned email declaring the rejection.

Verified Against: ZCS 8.5, ZCS 8.0, ZCS 7.0 Date Created: 03/21/2013
Article ID: https://wiki.zimbra.com/index.php?title=Domain_level_blocking_of_users Date Modified: 2015-03-05



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