Category:Zimbra/Restricting users to send mails to certain domains

Restricting users to send mails to certain domains

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

vi /opt/zimbra/conf/postfix_recipient_restrictions.cf

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

2. Enter following in "/opt/zimbra/conf/zmmta.cf"

vi /opt/zimbra/conf/zmmta.cf

 ###Find the section labeled SECTION mta and enter the following two lines directly below####

POSTCONF    smtpd_restriction_classes      local_only

POSTCONF    local_only                                 FILE  postfix_check_recipient_access.cf

3. Create a file "/opt/zimbra/conf/postfix_check_recipient_access.cf"

vi /opt/zimbra/conf/postfix_check_recipient_access.cf

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

4. 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

(all users in tipl domain) local_only

5. 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

domain.com OK

6. 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".