full-disclosure - Backdoor not recognized by Kaspersky

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From: nick at virus-l.demon.co.uk (Nick FitzGerald)
Subject: Backdoor not recognized by Kaspersky

Ron DuFresne <dufresne@...ternet.com> wrote:

> > how about the smtp server simply rejecting mail from spoofed hosts ?
> > as all the viruses generate spoofed hosts and it is very easy for any
> > smtp server to do a dns lookup on the sending server, if the hostname
> > / ip address do not match reject the message.
> 
> Finally some sanity marks this thread!

"sanity"??

Care to define the "nearly foolproof" "spoofed hosts detection" 
algorithm that will not have an unbearably high false-positive 
rejection rate??

Regards,

Nick FitzGerald