You asked almost the same question and I answered it on Monday. But here it
is again:
Your server should not send any message in response to an undeliverable
message. That means you use recipient filtering ("filter recipients who are
not in the directory") and tarpitting. It's also less load on the server
to do this.
Carl
_____
From: Kyle Plummer [mailto:[EMAIL PROTECTED]
Sent: Tuesday, March 18, 2008 11:42 AM
To: MS-Exchange Admin Issues
Subject: NDR attachment stripping or recipient filtering - which is better?
I'm using Exchange 2003 and am trying to keep my domain from participating
in NDR flood attacks. I've identified two possible methods: NDR attachment
stripping, or recipient filtering paired with SMTP tar pitting. Any
preference as to which is better, or are there other methods to fight this
crud?
Thanks in advance,
Kyle B. Plummer
~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~
~ http://www.sunbeltsoftware.com/Ninja ~
