Problem with SMTP headers

I'll admit that this may not be a problem with listhandler but based upon the output I'm seeing, this seems like a logical place to start. I'm running Drupal 4.7.6 with listhandler and the smtp authentication modules (plus the other modules needed to deal with mailing lists). The problem I'm having is more of an annoyance at this point but it looks like the SMTP headers are not being properly generated. I just sent myself a test email (I did edit the email addresses to cut down on spam) and here's what I got:

From - Wed May 30 21:16:26 2007
X-Account-Key: account3
X-UIDL: 1180573873.20864.ns0.webmasters.com
X-Mozilla-Status: 0001
X-Mozilla-Status2: 00000000
X-Mozilla-Keys:
Return-Path:
Delivered-To: virtual-mattsoldcars_com-dddd@eeeee.ffff
Received: (qmail 20859 invoked from network); 31 May 2007 01:11:13 -0000
Received: from unknown (HELO smtp1.fuse.net) (216.68.8.174)
by ns0.webmasters.com with SMTP; Wed, 30 May 2007 21:11:13 -0400
Received: from gx5.fuse.net ([208.102.69.204]) by smtp1.fuse.net
(InterMail vM.6.01.06.01 201-2131-130-101-20060113) with ESMTP
id <20070531011036.SYXO9987.smtp1.fuse.net@gx5.fuse.net>
for ; Wed, 30 May 2007 21:10:36 -0400
Received: from localhost ([208.102.69.204]) by gx5.fuse.net with ESMTP
id <20070531011036.GRYS9640.gx5.fuse.net@localhost>
for ; Wed, 30 May 2007 21:10:36 -0400
Date: Wed, 30 May 2007 21:10:23 -0400
Return-Path: aaaaa@bbbb.cccc
To: dddd@eeeee.ffff
From: mhaas
Subject: test
Message-ID: <926b8569ef82a83bda1628bedbe52ad0@localhost>
X-Priority: 3
X-Mailer: PHPMailer [version 1.73]
Message-Id:

:
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Content-Type: text/plain; charset="utf-8"

this is a test

The fourm posting looks perfect but when the message is viewed in an email client, I see everything after the Message-Id header due to the blank line after it. I did do some searches to see if anyone else has reported this problem but I didn't see a fix for it. Any help with this would be much appreciated.

Thanks,

Matt