Jens Teubner writes:
> Hi,
> 
> although I'm definitely not a SpamAssassin expert, I observed a pattern
> that was present in roughly half the spam mails I got during the last
> weeks.
> 
> --- snip ---
> Received: from 134.34.240.60 (unknown [202.99.169.213])
>         by guanin.uni-konstanz.de (Postfix) with SMTP
>         id 00DC026A9EE; Mon, 25 Aug 2003 18:48:39 +0200 (MEST)
> Received: from sq2.kn923p2.org [245.227.70.53] by 134.34.240.60 id
> --- snap ---
> 
> Our incoming mail server is guanin.uni-konstanz.de, with IP
> 134.34.240.60. Obviously the spammer sent this IP with the HELO command.

SpamAssassin 2.60 includes a test -- FORGED_RCVD_NET_HELO -- which catches
this.

--j.


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