I'm having an issue with mail local to the Zimbra machine (ie tripwire scripts, etc) not getting to their destination. for instance
adam@somedomain.com is handled by Zimbra, and my mailserver is named mail.

Nov 21 14:30:23 mail postfix/smtp[4944]: EBB62CFC80: to=<adam@mail.somedomain.com>, relay=[], delay=1, status=sent (250 2.6.0 Ok, id=24449-09, from MTA([]:10025): 250 Ok: queued as 203F7D002E)

Nov 21 14:30:23 mail postfix/smtp[5377]: 203F7D002E: to=<adam@mail.somedomain.com>, relay=none, delay=0, status=bounced (mail for mail.somedomain.com loops back to myself)

Normally a local MTA would deliver mail to the appropriate users.. do I have to add "mail.somedomain.com" to the Zimbra "Domains" and create aliases to get delivery?