Running CentOS 4 x86 , ZCS 5.0.1GA Community.

Everything is setup and functioning well (and has been for some time) except for local mail delivery.

The only thing different from standard on my setup is that I bound jetty to one IP per my own instructions here.

Sending mail through php scripts, the command line mail command, or things like logwatch reports never go through, are never logged in the maillog, messages, or zimbra log. Is this normal behavior for Zimbra? I have one server running CentOS 5 ZCS 5.0 GA that works correctly. I do have the hostname of the server setup as a domain in Zimbra.