Have a zimbra server installed on hostname zimbra.domain.com
zimbra.domain.com is a 2nd ip address on a box witha real hostname hostname.domain.com
zimbra is set to use zimbra.domain.com
have a user called firstname.lastname@example.org
incoming email works fine
when emails are reeived from ebay. Then postfix reports email@example.com cannot be found and bounces.
what is going on?