Vardhman spam blocking

Normal blacklist process of zimbra is not working in vardhman, this is why blocking was implemented on postfix at smtp level.

Same has been done on all the three servers of vardhman.

su - zimbra

vim /opt/zimbra/postfix/conf/sender_access  

user@domain.com   REJECT
domain2.com     REJECT

For Domain Level Rejection only domain name needs for be mentioned as shown above .

vim /opt/zimbra/conf/postfix_recipient_restrictions.cf

Add following as 2nd line

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

Create hash and restart postfix

postmap /opt/zimbra/postfix/conf/sender_access
postfix stop
postfix start

Reference:- http://wiki.zimbra.com/wiki/Rejecting_Emails_at_SMTP_Level