Re: [Asrg] New take on emerging idea. (Vulnerability)

[J C Lawrence <claw@kanga.nu>]

On Thu, 10 Apr 2003 13:28:47 -0600 
John Fenley <pontifier@hotmail.com> wrote:

> I did find a flaw that makes my system vulnerable to spammers.  An
> open relay could be used to spoof an address listed in the database
> that many people are subscribed to, thus bypassing all the systems.

The typical approach is to authenticate by both Return-Path and From:.
It doesn't prevent the abuse, but it significantly cuts down on its
reach.

-- 
J C Lawrence                
---------(*)                Satan, oscillate my metallic sonatas. 
claw@kanga.nu               He lived as a devil, eh?		  
http://www.kanga.nu/~claw/  Evil is a name of a foeman, as I live.
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