clean install of 5.0.10 GA Release on centos 5 32bit, everything installed without a hitch, added multiple domain, the sever is installed with say mail.domain1.com and domain2.com is added then email@example.com is added, however the mx record for domain2.com points to mail.domain1.com, no issue there. the problem is, if you email firstname.lastname@example.org you get a bounce message from email@example.com with the error:
This is an informative message sent by mail.domain1.com.
The server was not able to deliver your email message
Subject: pre test
Date: Fri, 17 Oct 2008 09:31:49 -0700
to the following addresses:
firstname.lastname@example.org (mail.domain1.com: Mailbox does not exist)
but it does and even zmaccts shows that it exists.
also to note the account the test mail is sent from it not on the zimbra server, and it does get the bounce response, thus DNS and connectivity are working fine.