Exch2007 5.7.1 in reply to RCPT TO command

Hi all, we just got this weird message and I can't find that much info on the problem. Our reverse dns is working, I checked that. I checked out the spam filter for lvmc.com and it is apparently Microsoft's version of Postini. The mxlookup goes to mail.global.frontbridge.com, which is Microsoft's Hosted Spam Filtering.

I don't know what could be the issue. See error below.



An error occurred while trying to deliver this message to the recipient's e-mail address. Microsoft Exchange will not try to redeliver this message for you. Please try resending this message, or provide the following diagnostic text to your system administrator.
 
 
Diagnostic information for administrators:
 
Generating server: mail27-wa4-R.bigfish.com
 
gallagheragncy@lvmc.com
#< #5.0.0 X-Postfix; host 65.160.29.242[65.160.29.242] said: 550 5.7.1 Unable to deliver to <gallagheragncy@lvmc.com> (in reply to RCPT TO command)> #SMTP#
 
Original message headers:
 
Received: from mail27-wa4 (localhost.localdomain [127.0.0.1])   by
 mail27-wa4-R.bigfish.com (Postfix) with ESMTP id 85A641428527   for
 <gallagheragncy@lvmc.com>; Fri, 13 Feb 2009 21:16:41 +0000 (UTC)
X-BigFish: vp
X-MS-Exchange-Organization-Antispam-Report: OrigIP: 24.234.53.221;Service: EHS
Received: by mail27-wa4 (MessageSwitch) id 1234559800411344_22656; Fri, 13 Feb 2009 21:16:40 +0000 (UCT)
Received: from KMANT1.kma.int (mail.keepmemoryalive.org [24.234.53.221])
        (using TLSv1 with cipher AES128-SHA (128/128 bits))
        (No client certificate requested)
        by mail27-wa4.bigfish.com (Postfix) with ESMTP id 2AA5A68805D
        for <gallagheragncy@lvmc.com>; Fri, 13 Feb 2009 21:16:40 +0000 (UTC)
Received: from KMANT1.kma.int ([fe80::5110:9dd:9395:8c0d]) by KMANT1.kma.int
 ([fe80::5110:9dd:9395:8c0d%11]) with mapi; Fri, 13 Feb 2009 13:16:31 -0800
From: Amanda Underwood | Keep Memory Alive <Aunderwood@keepmemoryalive.org>
To: "'gallagheragncy@lvmc.com'" <gallagheragncy@lvmc.com>
Date: Fri, 13 Feb 2009 13:16:30 -0800
Subject: Press Announcement at Lou Ruvo Brain Institute
Thread-Topic: Press Announcement at Lou Ruvo Brain Institute
Thread-Index: AcmOHyc2Yzqh2EqeSmauYuQ2EXMH3AAASsrg
Message-ID: <90092E49168D734EB5923083FFE98C9E22654223EB@KMANT1.kma.int>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
acceptlanguage: en-US
Content-Type: multipart/alternative;
        boundary="_000_90092E49168D734EB5923083FFE98C9E22654223EBKMANT1kmaint_"
MIME-Version: 1.0




Anyone have any ideas?