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From: incidents at (Incident List Account)
Subject: Re: E-Mail viruses

Curt, be carefull not to strain your arm patting yourself on the back :) I actually really like your solution UNTIL the "completely eliminates the need for antivirus on the mail server" comment. If an outside party follows the procedure and remnames his file to and sends it to your user, are you 100% confident in that outside party's attachement is not inadvetantly infected with a virus? I agree that only allowing a certain obscure extension through to your user eliminates the VAST majority of the problems. I would not however trust any file from a third party with out some sort of scan.

> Methinks you misunderstand.  Only the proprietary extension, i.e. .inc or
> .xyz or .whatever, would be allowed through, and since virus writers would
> never use this extension, it would eliminate ALL viruses at the gateway.
> The nice thing about this approach is that it completely eliminates the need
> for any anti-virus on the mail server since all virus attachments are
> automatically dropped without the need for scanning.  Quite a simple, yet
> elegant solution, if I do say so myself.
> Information Security Engineer
> DP Solutions
> ----------------------------------------
> If you spend more on coffee than on IT security, you will be hacked.
> What's more, you deserve to be hacked.
> -- White House cybersecurity adviser Richard Clarke
> _______________________________________________
> Full-Disclosure - We believe in it.
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