Zimbra whitelist

Postfix whitelist when using RBL's

If you are using RBLs (such as zen.spamhaus.org) to block spam, the whitelist method above does not work, because it is for spamassasin not postfix.

Postfix will check incoming messages against the RBL first, and allow/reject accordingly. So if you have a sender listed on a RBL, you need to whitelist them in Postfix.

To do this in Zimbra: {commands in italics}

Login and change to zimbra user

vi /opt/zimbra/conf/postfix_rbl_override

list all IP addresses or host names (one per line!) that you want to whitelist:

1.2.3.4 OK
1.2.3.5 OK
mail.freemailer.tld OK

postmap /opt/zimbra/conf/postfix_rbl_override

vi /opt/zimbra/conf/postfix_recipient_restrictions.cf

under: reject_unauth_destination

add: check_client_access hash:/opt/zimbra/conf/postfix_rbl_override

e.g.:

reject_unauth_destination
check_client_access hash:/opt/zimbra/conf/postfix_rbl_override
reject_unlisted_recipient

zmmtactl restart

Each time you add a new one, you need to do the postmap command then zmmtactl restart (Also, this may be removed after a Zimbra upgrade)