DL/Distribution List restriction in Zimbra Mailserver

In zimbra Mailserver you can restrict/allow specific user to send mail in DL .
Follow the steps to perform the task

Login to zimbra user

Go to file and search  = smtpd_recipient_restrictions
$vim /opt/zimbra/conf/zmconfigd.cf

copy line of zmconfigd/smtpd_recipient_restrictions.cf and edit

$  /opt/zimbra/conf
$vim zmconfigd/smtpd_recipient_restrictions.cf
###paste in 2nd line.....
check_recipient_access hash:/opt/zimbra/postfix/conf/protected_recipients

or, for Zimbra 8.6 or above version change hash to texthash

check_recipient_access texthash:/opt/zimbra/postfix/conf/protected_recipients

Create file here
$cd /opt/zimbra/postfix/conf/

$touch permitted_senders

$vim permitted_senders
shahzad@example.com ok

$touch protected_recipients
$vim protected_recipients
mail2all@example.com permitted_senders

Add Parameter in bottom of postfix config file
$vim /opt/zimbra/postfix/conf/main.cf
permitted_senders = check_sender_access hash:/opt/zimbra/postfix/conf/permitted_senders, reject
smtpd_restriction_classes = permitted_senders

update file
$postmap protected_recipients
$postmap permitted_senders

Reload posftix 
$postfix reload

Now you can test the setup, if you find any difficulty to perform this task, you can comment below of this article.

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About Penguin Technology

I am a passionate cloud and DevOps professional specializing in Linux and open-source solutions. Through this blog, I share my knowledge and experience with the community, offering tips and insights on cloud technologies and DevOps practices.