Hi all...

So I'm running a test server right now for my company. I've built and run a Zimbra server before so I wouldn't say I'm *too* wet behind the ears when it comes to this stuff...

...however, today, when sending mail from my Zimbra test server to a known-good user on our current horde-based mail service, I instantly get a bounceback from the Zimbra server saying that the mail was undelivered. Below is the header from that message...perhaps someone could give me a hand in isolating the issue?

Oh, and real names and domains have been changed to protect privacy.

Thanks all!


Content-Description: Notification
Content-Type: text/plain; charset=us-ascii

This is the mail system at host zimbratest.domain.com.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The mail system

<targetuser@livedomain.com>: livedomain.com

Content-Description: Delivery report
Content-Type: message/delivery-status

Reporting-MTA: dns; zimbratest.domain.com
X-Postfix-Queue-ID: 767948F0FFA
X-Postfix-Sender: rfc822; sender@zimbratest.domain.com
Arrival-Date: Fri, 30 May 2008 13:49:10 -0500 (CDT)

Final-Recipient: rfc822; targetuser@livedomain.com
Original-Recipient: rfc822;targetuser@livedomain.com
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; livedomain.com

Content-Description: Undelivered Message
Content-Type: message/rfc822
Content-Transfer-Encoding: 7bit

Received: from localhost (localhost.localdomain [])
by zimbratest.domain.com (Postfix) with ESMTP id 767948F0FFA
for <targetuser@livedomain.com>; Fri, 30 May 2008 13:49:10 -0500 (CDT)
X-Virus-Scanned: amavisd-new at
X-Spam-Flag: NO
X-Spam-Score: -4.268
X-Spam-Status: No, score=-4.268 tagged_above=-10 required=6.6
tests=[ALL_TRUSTED=-1.8, AWL=0.130, BAYES_00=-2.599,
Received: from zimbratest.domain.com ([])
by localhost (zimbratest.domain.com []) (amavisd-new, port 10024)
with ESMTP id yydkSkwvQ13o for <targetuser@livedomain.com>;
Fri, 30 May 2008 13:49:09 -0500 (CDT)
Received: from zimbratest.domain.com (zimbratest.domain.com [])
by zimbratest.domain.com (Postfix) with ESMTP id AEDC78F0FF9
for <targetuser@livedomain.com>; Fri, 30 May 2008 13:49:09 -0500 (CDT)
Date: Fri, 30 May 2008 13:49:09 -0500 (CDT)
From: sender <sender@domain>
To: targetuser <targetuser@livedomain.com>
Message-ID: <1025675594.311212173349548.JavaMail.root@zimbrate st.domain.com>
In-Reply-To: <1083381167.291212173345590.JavaMail.root@zimbrate st.domain.com>
Subject: Action Plan
MIME-Version: 1.0
Content-Type: multipart/mixed;
X-Originating-IP: []
X-Mailer: Zimbra 5.0.5_GA_2201.RHEL5_64 (ZimbraWebClient - FF2.0 (Mac)/5.0.5_GA_2201.RHEL5_64)