Difference between revisions of "Block user to send email locally or externally"

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=Block user to send email locally or externally=
=Block user to send email locally or externally=

Revision as of 01:01, 31 July 2018

Block user to send email locally or externally

   KB 23348        Last updated on 2018-07-31  

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How to block users to send email locally or externally.


Step 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"

Step 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

Step 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

Step 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
Step 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 don't want to send emails inside or outside from this id. Following is the command :

touch /opt/zimbra/postfix/conf/local_domains
Step 6

Run following commands

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

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Submitted by: Navdeep Mathur
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