full-disclosure - AW: Filtering sobig with postfix

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Message-ID: <DF79BE12AF8DD344B107D0D03621E5750ED9C9@kermit.corp.hansenet.com>
From: vogt at hansenet.com (vogt@...senet.com)
Subject: AW: Filtering sobig with postfix 

> > /see attached file for details/	REJECT
> > 
> > ever since, I've not had a single one coming through.
> 
> The reason this one works for the worm writers is because 
> it's standard English
> usage - as a result, it's *very* prone to false positives.  
> And you give no indication
> of *why* the file was rejected, so the sender has no idea 
> that if he re-sends but
> says "Hey check out the file for the long version" instead it 
> will get through.

It ain't perfect, but it works. I'll probably remove it once
this storm has blown over. I wanted to share it because it is
easy to implement and works like charm.

The improved version:

/see attached file for details/	554 Refusing to accept your virus e-mail

should solve the problem that the sender has no idea why his
mail was rejected.


Tom Vogt