A client of mine is experiencing issues with his email, it appears that whenever he receives email from a certain domain it comes as duplicates. Not only are they duplicates but the duplicated items have a (+) sign next to them which usually indicates an attachment.

Could this be because of a forwarding issue?

Here are the headers:
Return-Path: <[email protected]>
Received: from bigcat.centralmasswebdesign.com (root@localhost)
by tarbellconstruction.com (8.13.1/8.13.1) with ESMTP id o4OFnO23003379
for <[email protected]>; Mon, 24 May 2010 11:49:24 -0400
X-ClientAddr: 72.249.26.200
Received: from mf3.spamfiltering.com (mf3.spamfiltering.com [72.249.26.200])
by bigcat.centralmasswebdesign.com (8.13.1/8.13.1) with ESMTP id o4OFnOjF005520
for <[email protected]>; Mon, 24 May 2010 11:49:24 -0400
X-Envelope-From: [email protected]
X-Envelope-To: [email protected]
Received: From 67-132-16-226.dia.static.qwest.net (67.132.16.226) by mf3.spamfiltering.com (MAILFOUNDRY) id 6lzIAmdLEd+oFQAw for [email protected]; Mon, 24 May 2010 15:49:23 -0000 (GMT)
Received: from mail pickup service by WMA2-EXCH1.NELCO-USA.net with Microsoft SMTPSVC;
Mon, 24 May 2010 11:49:18 -0400
Content-Transfer-Encoding: 7bit
Importance: normal
Priority: normal
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.3790.4325
Content-Class: urn:content-classes:message
MIME-Version: 1.0
Content-Type: multipart/mixed;
boundary="----_=_NextPart_001_01CAFB58.AAB268D0"
Subject: weekly activity report for week ending May 22, 2010
Date: Mon, 24 May 2010 11:49:16 -0400
Message-ID: <15BCC4D99E8CBF48A2FA37A318CFF5C801209CCC@wma2-exch1.NELCO-USA.net>
X-MS-Has-Attach: yes
X-MS-TNEF-Correlator:
Thread-Topic: weekly activity report for week ending May 22, 2010
thread-index: Acr7WKpdCelRCiocT1eBY2YN5Ma8DA==
From: "Mike LeBlanc" <[email protected]>
To: "Keith Berube" <[email protected]>,
"Ken Tarbell" <[email protected]>
X-OriginalArrivalTime: 24 May 2010 15:49:18.0361 (UTC) FILETIME=[AB546890:01CAFB58]