RE: [Asrg] Some data on the validity of MAIL FROM addresses

"Eric Dean" <eric@purespeed.com> Tue, 20 May 2003 03:11 UTC

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From: Eric Dean <eric@purespeed.com>
To: Kee Hinckley <nazgul@somewhere.com>
Cc: Alan DeKok <aland@freeradius.org>, asrg@ietf.org
Subject: RE: [Asrg] Some data on the validity of MAIL FROM addresses
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Date: Mon, 19 May 2003 23:08:49 -0400
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>
> Obviously those all overlapped a good deal.  Your immediate reaction
> might be to make sure that the sender domain matches the HELO.  After
> all, it would nail half the spam right there.  But then again, it
> would also block most of the mail coming from my domain and many
> others.  My mail server always uses the primary domain name in the
> HELO, no matter which domain it sends for.  That's probably true of
> most servers.


Yes, we host 300 domains...trying to do RFC checking is a miserable
experience when many mail admins don't even perform reverse-DNS registration
or forward registration of the HELO host.

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