>> Received: from mout3.freenet.de (localhost [127.0.0.1])
>>      by mymxserver.com (Postfix) with ESMTP id 9868FB16D96
>>      for <u...@myvirtualdomain.com>; Tue, 28 Jul 2009 14:32:46 -0400  
>> (EDT)
>
> I am beginning to suspect that it's possible to spoof localhost to get
> around assp. Anyone have any thoughts? I'm sure that incoming port
> 10024 and 1025 are blocked from the outside, so perhaps one can
> successfully spoof the sending server's IP to be localhost (as above,
> perhaps), so that assp simply passes the mail to the SMTP server or
> amavisd.
>
> Anyone have any thoughts?
>
> T.

I had a similar problem last year with 1.x ASSP. I had both ASSP and  
SMTP server (listening on 52525) running on same unix machine. Port  
52525 was firewalled and the SMTP server was configured to only accept  
connections from localhost.

Somehow spam was getting around ASSP which I knew because I configured  
ASSP to add X-Assp headers and these were missing. I finally resolved  
it by writing a filter for the SMTP server that rejected all mail that  
was missing and X-Assp header.
------
Max Lyth


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