From: Sam Roberts <sroberts@...>
Date: 2005-01-11T00:45:20+09:00
Subject: Re: Mailing list gateway getting reportted at SpamCop

Quoteing dennis@lauschmusik.de, on Tue, Jan 11, 2005 at 12:35:57AM +0900:
> >"Dennis Oelkers" <dennis@lauschmusik.de> schrieb im Newsbeitrag 
> >news:41DD0FCE.80301@lauschmusik.de...
> >- change their algorithm to just include original posters not gateways.
> 
> Well, in fact it is already almost working like that. Instead of the 
> original poster (which could only be determined by the
> From-header (which could be forged), it looks at the Received-header and 
> mails the site-contact which is listed in the whois db
> of the netblock where the mail originates from. Due to the fact that the 
> gateway is the first hop where the mail enters SMTP space,
> it will always be our host, no matter who wrote the mail.

I might be in outer-space here, but the gateway shouldn't be the first
hop... is there information in the Usenet message that can be used to
construct a received header (by the gateway) that points backwards to
the sender so that it doesn't look like its the gateway that originates
the email?

Cheers,
Sam