Difference between revisions of "Domain level blocking of users"

m (Protected "Domain level blocking of users" (‎[edit=sysop] (indefinite) ‎[move=sysop] (indefinite)))
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{{ZC}}{{Article Infobox|{{admin}}|{{ZCS 8.6}}|{{ZCS 8.5}}|{{ZCS 8.0}}|{{ZCS 7.0}}|}}
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{{BC|Certified}}
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__FORCETOC__
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<div class="col-md-12 ibox-content">
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=Domain level blocking of users=
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{{KB|{{ZC}}|{{ZCS 8.6}}|{{ZCS 8.5}}|{{ZCS 8.0}}|}}
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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.
  
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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].
  
1. Set smtpd_sender_restrictions as appropriate for the version of ZCS
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*Set smtpd_sender_restrictions as appropriate for the version of ZCS
ZCS 7:
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** ZCS 7:
 
  zmlocalconfig -e postfix_smtpd_sender_restrictions="hash:/opt/zimbra/postfix/conf/postfix_reject_sender"
 
  zmlocalconfig -e postfix_smtpd_sender_restrictions="hash:/opt/zimbra/postfix/conf/postfix_reject_sender"
  
ZCS 8.0:
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** ZCS 8.0:
 
  Add "client_sender_access hash:/opt/zimbra/postfix/conf/postfix_reject_sender" as the first line of '''/opt/zimbra/conf/zmconfigd/smtpd_sender_restrictions.cf'''
 
  Add "client_sender_access hash:/opt/zimbra/postfix/conf/postfix_reject_sender" as the first line of '''/opt/zimbra/conf/zmconfigd/smtpd_sender_restrictions.cf'''
  
ZCS 8.5 and 8.6:
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** ZCS 8.5 and 8.6:
Create the postmap database as defined below
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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:
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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/postfix/conf/postfix_reject_sender%%
 
  %%contains VAR:zimbraMtaSmtpdSenderRestrictions check_sender_access lmdb:/opt/zimbra/postfix/conf/postfix_reject_sender%%
 
   
 
   
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  zmprov ms <zmhostname> +zimbraMtaSmtpdSenderRestrictions "check_sender_access lmdb:/opt/zimbra/postfix/conf/postfix_reject_sender"
 
  zmprov ms <zmhostname> +zimbraMtaSmtpdSenderRestrictions "check_sender_access lmdb:/opt/zimbra/postfix/conf/postfix_reject_sender"
  
2. Create file /opt/zimbra/postfix/conf/postfix_reject_sender with the list of email addresses and domains to be rejected in the below format:
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* Create file /opt/zimbra/postfix/conf/postfix_reject_sender with the list of email addresses and domains to be rejected in the below format:
 
   user@domain.com REJECT
 
   user@domain.com REJECT
 
   domainX.com REJECT
 
   domainX.com REJECT
  
3. postmap it and restart postfix
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* postmap it and restart postfix
 
   /opt/zimbra/postfix/sbin/postmap /opt/zimbra/postfix/conf/postfix_reject_sender
 
   /opt/zimbra/postfix/sbin/postmap /opt/zimbra/postfix/conf/postfix_reject_sender
 
   zmmtactl stop && zmmtactl start
 
   zmmtactl stop && zmmtactl start
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Reject messages will be logged in <tt>/var/log/zimbra.log</tt> ; format looks like this:
 
Reject messages will be logged in <tt>/var/log/zimbra.log</tt> ; format looks like this:
 
 
  [date / hostname] postfix/smtpd[####] NOQUEUE: reject: RCPT from [remote mta]: 554 5.7.1 <senders-email@DOMAIN>:
 
  [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>
 
  Sender address rejected: Access denied: from=<senders-email@DOMAIN> to=<local-zimbra-user@domain> proto=ESMTP helo=<remote mta>

Revision as of 23:35, 7 December 2015

Domain level blocking of users

   KB 2689        Last updated on 2015-12-7  




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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.

  • Set smtpd_sender_restrictions as appropriate for the version of ZCS
    • ZCS 7:
zmlocalconfig -e postfix_smtpd_sender_restrictions="hash:/opt/zimbra/postfix/conf/postfix_reject_sender"
    • ZCS 8.0:
Add "client_sender_access hash:/opt/zimbra/postfix/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/postfix/conf/postfix_reject_sender%%

Then execute:
zmprov ms <zmhostname> +zimbraMtaSmtpdSenderRestrictions "check_sender_access lmdb:/opt/zimbra/postfix/conf/postfix_reject_sender"
  • Create file /opt/zimbra/postfix/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
  • postmap it and restart postfix
 /opt/zimbra/postfix/sbin/postmap /opt/zimbra/postfix/conf/postfix_reject_sender
 zmmtactl stop && zmmtactl start

Check the Postfix configuration with postconf | grep smtpd_sender_restrictions

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: 2015-12-07



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