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How to Create IPSec Filter Lists

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This article explains how to create IPSec filter lists for the purpose of blocking inbound and outbound SMTP traffic on TCP port 25.

Before You Begin

It is recommended that you review Slowing and Stopping E-mail Viruses in Exchange Server 2003: Optional Configurations before implementing this procedure.

Procedure

To Create IPSec Filter Lists

  1. You must create one filter list to block inbound SMTP connection requests and one filter list to block outbound SMTP connection requests.