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10.0

exchange 2003 NDR Attacks

Asked by bman9111 in Exchange Email Server

Tags: 2003, exchange, attacks

It appears there are tons of emails trying to be sent out from our system. I opened up these emails and some have a from address of postmaster@ourdomain.com and other from field is black.

This appears to be a NDR attack. Now I know somewhat about the filtering options but we have windows 2000 and it was not suggested to apply any filtering because of AD harvest issues.

Since we do not have windows 2003 to turn on tar pitting option what can I do? This is causing all kinds of bouncebacks to employees trying to say they sent an email to ex-employees that no longer exist.

Our queues are really starting to fill up quickly after I cleared them.
[+][-]10/20/07 07:22 AM, ID: 20114856Expert Comment

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[+][-]10/20/07 08:27 AM, ID: 20115124Author Comment

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[+][-]10/20/07 09:38 AM, ID: 20115337Accepted Solution

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About this solution

Zone: Exchange Email Server
Tags: 2003, exchange, attacks
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Solution Provided By: Sembee
Participating Experts: 1
Solution Grade: A
 
 
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