I have found an entity that "retails" MXlogic spam filtering.  Through another service, I have the same company's MS Exchange and Blackberry BES service, and I've grown to like the virus and spam  filtering available through MXlogic.

I have tried to set up MX logic on my Lunarpages email, but without success.  I have the nameserver managed by Lunarpages with the MX record pointed to MXlogic.  MXlogic, in turn, points back to the domain name ("alunardomain.us") for redelivering the filtered email.

It doesn't work.  I've just changed the redelivery address to "mail.alunardomain.us" to see if that might work.

The error message looks like:
=========
From: Mail Delivery System <MAILER-DAEMON@p01c11m057.mxlogic.net>
To: phrider@yahoo.com
Sent: Tuesday, April 17, 2007 10:06:58 AM
Subject: Mail delivery failed


This message was created automatically by mail delivery software.

A message that you have sent could not be delivered to one or more
recipients.  This is a permanent error.  The following address failed:

  <phrider@alunardomain.us>: 550 Authentication turned on in your email client.



Included is a copy of the message header:
-----------------------------------------
Received: from unknown [206.190.39.106] (HELO web50811.mail.re2.yahoo.com)
    by p01c11m057.mxlogic.net (mxl_mta-5.0.0-1)
    with SMTP id 1bef4264.2675944368.8247.00-083.p01c11m057.mxlogic.net (envelope-from <phrider@yahoo.com>);
    Tue, 17 Apr 2007 11:06:57 -0600 (MDT)
Received: (qmail 79840 invoked by uid 60001); 17 Apr 2007 17:06:56 -0000
DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws;
  s=s1024; d=yahoo.com;
  h=X-YMail-OSG:Received:X-Mailer:Date:From:Reply-To:Subject:To:MIME-Version:Content-Type:Message-ID;
  b=bLXvSKVeplB4C6OAtf305MvJ0KtUZZX/2SwymW2Aa2rO1S6vcdqxv/AWi9phoO707dErfdL9kYew6A/qQx4675pICFj/pfXtP
P4E/qFhAqn7cYX4oxxPZJAnnt/3ekCRIyCcG27s8gsimS1Gd6t1bfeH4zc3DtWV06mON/buK6U=;
X-YMail-OSG: kMMBXLIVM1m_QpU.IaC_VHaa6CoNzutXF9NPoP0WNu5pE5_0dSh_HdS2Cl._KDfIZQ--
Received: from [76.80.220.226] by web50811.mail.re2.yahoo.com via HTTP; Tue, 17 Apr 2007 10:06:56 PDT
X-Mailer: YahooMailRC/478 YahooMailWebService/0.7.41.10
Date: Tue, 17 Apr 2007 10:06:56 -0700 (PDT)
From: phrider <phrider@yahoo.com>
Subject: How is screening?
To: phrider@alunardomain.us
MIME-Version: 1.0
Content-Type: text/plain; charset=ascii
Message-ID: <733815.77835.qm@web50811.mail.re2.yahoo.com>
=========

Help?  Suggestions?

Have you tried turning authentication off in your email client?

Any new experience with MXlogic email spam scanning, and linking it to Lunarpages?