MailScanner: Could not analyze message

[Gary Faith]

I have some e-mail being sent by one individual to MailScanner running ver 4.79.11 and the messages are getting tagged as {Dangerous Content?}.  I am running MailScanner with clamav & sanesecurity signatures, scamnailer, razor, pyzor & dcc.  Mailwatch reports that it isn't a virus it is "Other Infection":

Anti-Virus/Dangerous Content Protection
Virus: N 
Blocked File: N 
Other Infection: Y 
Report:MailScanner: Could not analyze message

The message has contains this:

Warning: This message has had one or more attachments removed
Warning: (the entire message).
Warning: Please read the "XXX-Attachment-Warning.txt" attachment(s) for more information.

This is a message from the MailScanner E-Mail Virus Protection Service
----------------------------------------------------------------------
The original e-mail message contained potentially dangerous content,
which has been removed for your safety.

At Wed May 19 15:36:22 2010 the content filters said:
   MailScanner: Could not analyze message

The sender uses Maximizer to generate the e-mail with a PDF attachment.  I had the sender use Maximizer and send only the message without the attachment and it comes in fine.  I had them send only the attachment via Outlook and it comes in fine.  It seems the problem is with Mazimizer but I am not sure why.  

I can send the quarantined message or whatever is needed to determine the problem off list.

I need help in tracking down where the problem is and getting it fixed.

Thanks,

Gary Faith