Block user to send email locally or externally

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Block user to send email locally or externally



Problem

How to block user to send email locally or externally

Solution:

1. Open file /opt/zimbra/conf/zmconfigd/smtpd_sender_restrictions.cf and add this line at the top

%%contains VAR:zimbraMtaSmtpdSenderRestrictions check_sender_access lmdb:/opt/zimbra/postfix/conf/restricted_senders%%

Then execute :

zmprov ms `zmhostname` +zimbraMtaSmtpdSenderRestrictions "check_sender_access lmdb:/opt/zimbra/postfix/conf/restricted_senders"

2. Open file /opt/zimbra/conf/zmconfigd.cf and add those lines before RESTART mta. This is example on my system

POSTCONF    smtpd_restriction_classes  local_only
POSTCONF    local_only  FILE  postfix_check_recipient_access.cf
RESTART mta

3. Create a file /opt/zimbra/conf/postfix_check_recipient_access.cf and add the following line

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

4. Create a file “/opt/zimbra/postfix/conf/restricted_senders” and list a user which you want to block. Follow this syntax :

user@yourdomain.com            local_only

5. Create an empty file “/opt/zimbra/postfix/conf/local_domains”, here we list all the domains where “restricted users” allowed to send mails. But we will keep this blank file as we dont want to send emails inside or outside from this id. Following is the commmand :

touch /opt/zimbra/postfix/conf/local_domains

6. Run following commands

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


"Navdeep Mathur"

<mathurn@zimbra.com>

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