bugtraq - Re: Is predictable spam filtering a vulnerability?

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Message-ID: <Pine.LNX.4.58.0406170727510.5272@shishi.roaringpenguin.com>
Date: Thu, 17 Jun 2004 07:28:45 -0400 (EDT)
From: "David F. Skoll" <dfs@...ringpenguin.com>
To: R Armiento <rar_bt@...iento.se>
Cc: bugtraq@...urityfocus.com
Subject: Re: Is predictable spam filtering a vulnerability?

On Wed, 16 Jun 2004, R Armiento wrote:

> However, 'C':s spam filter silently drops the email.

In my opinion, any spam filter that silently drops e-mail is broken, and
is indeed a security risk.  A spam filter MUST respond with a 500 SMTP
failure code if it rejects a message.

Regards,

David.