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Date:      Mon, 01 Mar 2004 17:08:20 +0000
From:      Andrew Boothman <andrew@mux.org.uk>
To:        =?ISO-8859-1?Q?Dag-Erling_Sm=F8rgrav?= <des@des.no>
Cc:        Kris Kennaway <kris@obsecurity.org>
Subject:   Re: SPAM/virii apparently from freeBSD addresses.
Message-ID:  <40436E04.9000706@mux.org.uk>
In-Reply-To: <xzpfzcstspb.fsf@dwp.des.no>
References:  <Pine.BSF.4.21.0402291639340.27862-100000@InterJet.elischer.org> <20040301032856.GA10110@xor.obsecurity.org> <xzpfzcstspb.fsf@dwp.des.no>

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Dag-Erling Smørgrav wrote:

>>>Somewhere out there there is a ?Virus?/?Hacker?/?Spammer?
>>>getting really annoying..
>>
>>Yeah, but what do you expect anyone to do about it?
> 
> 
> Swen and MyDoom are easy to detect and reject at the SMTP stage.  The
> fact that our mail servers don't do this is a PITA, as it forces list
> subscribers to accept them as well (if you reject list mail because it
> contains a virus, Mailman disables your subscription).

You shoudn't reject email because it contains Swen or MyDoom anyway, all 
you'll do is generate a bounce message to someone who never sent you the 
infected mail in the first place - becuase the SMTP envelope addresses 
are forged.

I believe the correct thing to do is to accept in and silently drop it.



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