Restrict users to certain domain

Revision as of 20:17, 10 April 2008 by King0770 (talk | contribs)

Restricting users to send mails to certain domains.

This document describes how to restrict a list of users for sending emails to limited domains. Other users can send mails anywhere. Everything I am doing here as Zimbra user.

Enter following in the file “/opt/zimbra/conf/”. Make sure it is entered at the top of the file.

vi /opt/zimbra/conf/
check_sender_access hash:/opt/zimbra/postfix/conf/restricted_senders 

Enter following in "/opt/zimbra/conf/"

vi /opt/zimbra/conf/
POSTCONF    smtpd_restriction_classes      local_only
POSTCONF    local_only                                 FILE

Create a file "/opt/zimbra/conf/"

vi /opt/zimbra/conf/
check_recipient_access hash:/opt/zimbra/postfix/conf/local_domains, reject

Create a file "/opt/zimbra/postfix/conf/restricted_senders" and list all the users, whom you want to restrict. Follow this syntax:

vi /opt/zimbra/postfix/conf/restricted_senders            local_only

Create a file "/opt/zimbra/postfix/conf/local_domains" and list all the domains where "restricted users" allowed to sent mails. Please follow this syntax:

vi /opt/zimbra/postfix/conf/local_domains                     OK      OK

Run following commands:

postmap /opt/zimbra/postfix/conf/restricted_senders
postmap /opt/zimbra/postfix/conf/local_domains 
zmmtactl stop 
zmmtactl start

After these settings, all the users listed in "/opt/zimbra/postfix/conf/restricted_senders" are restricted to send mails only to domain which are defined in "/opt/zimbra/postfix/conf/local_domains", other are fully allowed to send mails anywhere. These settings will not survive Zimbra upgrades, please make sure that you backup of all these settings while performing upgrades.

Important Note if you need to undo this configuration

Remove the two lines that were added to the file. Make sure the Postfix setting smtpd_restriction_classes has nothing set. postconf -e smtpd_restriction_classes= zmmtactl reload

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