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From: Tremaine Lea <tremaine () gmail com>
Date: Fri, 04 Dec 2009 06:08:51 -0700


It's a fairly common practice for spammers.

Tremaine Lea
Network Security Consultant
Intrepid ACL
"Paranoia for hire"

AFH Security wrote:
Hey guys,

I was wondering if there was a way of bypassing blacklist and spam
I keep receiving emails from a domain and I've blocked the ip from my
server as well as blacklisted the email but for some reason they keep
getting through. I'm guessing they're using a DNS with a low ttll with
a botnet? (Yes kinda like the movie Untraceable).
That'd be awesome if I could get some form of a response.

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