I have a zimbra 8.7.11 community edition server running on Ubuntu 14.04.5 LTS.
Sometimes, individual SMTP servers from very large domains, such as yahoo.com or hotmail.com get listed in DNS RBLs.
I was trying to whitelist their servers at the postfix level using this file:
/opt/zimbra/conf/postfix_blacklist
Here is an example:
mail-dm3nam03on0060.outbound.protection.outlook.com OK
mail-dm3nam03on0077.outbound.protection.outlook.com OK
mail-oln040092008029.outbound.protection.outlook.com OK
*outbound.protection.outlook.com OK
I ran postmap /opt/zimbra/conf/postfix_blacklist afterwards.
The wildcard entry at the bottom doesn't seem to whitelist every hostname within the .protection.outlook.com domain and there are too many actual host names to try and whitelist. We typically whitelist when we notice a host is getting blocked, but that's more of a reactionary approach and doesn't seem to be very efficient.
Is it possible to use wildcards here?