If there is an AT&T postmaster responsible for "attrh3i.attrh.att.com" or "wsscan.att.com" out there, please respond to me off-list.  Your server is sending the below error message to mpls-ops@mpslrc.com, but the error message doesn't identify the offending account so short of removing all AT&T accounts, I'm at a loss as to how to fix it.
 
I've sent numerous messages to postmaster@att.com have not received a response.
 
X-POP3-Rcpt: mplsrc12@mplsrc.com
Date: Fri, 1 Feb 2002 12:56:01 -0500
X-Authentication-Warning: host.secure4-hosting.net: mplsrc12 set sender to mpls-ops-request@mplsrc.com using -f
X-From_: Fri Feb  1 12:55:57 2002
Old-Date: Fri, Feb  1 2002 12:54:45 EST
From: MAILER-DAEMON@attrh3i.attrh.att.com
To: mpls-ops-request@mplsrc.com
Subject: Message status notification
X-Diagnostic: Mail coming from a daemon, ignored
X-Diagnostic: Possible loopback problem
X-Envelope-To: mpls-ops-request

The mail routing agent encountered the following class of error:

No entries found in directory for query

----- Original Message Text Follows -----

Received: from wsscan.att.com (135.71.63.10) by attrh3i.attrh.att.com (5.5.029)
        id 3C06950500ECC026; Fri, 1 Feb 2002 12:54:43 -0500
Received: by wsscan.att.com; id MAA04196; Fri, 1 Feb 2002 12:55:33 -0500 (EST)
Received: from almsi2.proxy.att.com(192.168.108.71) by cyrus0.wsscan.att.com via csmap (V4.1)
        id srcAAAoCaqmi; Fri, 1 Feb 02 12:55:33 -0500
Received: from host.secure4-hosting.net ([209.239.41.31])
        by almsi2.proxy.att.com (AT&T IPNS/MSI-3.0) with ESMTP id g11HtXV24334;
        Fri, 1 Feb 2002 12:55:34 -0500 (EST)
Received: (from mplsrc12@localhost)
        by host.secure4-hosting.net (8.10.2/8.10.2) id g11HtXm19174;
        Fri, 1 Feb 2002 12:55:33 -0500
Resent-Date: Fri, 1 Feb 2002 12:55:33 -0500