Ask the Expert

Native Exchange Server 2003 antispam solutions

How can I configure Exchange Server 2003 to automatically reject email messages -- mostly spam -- that are sent to non-existing mailboxes?

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The best way to "block" messages is to implement a solid antispam solution. Exchange's Intelligent Message Filter (IMF) should be enabled at a minimum. You can also look at supplementing IMF with a connection filter. Connection filters allow you to subscribe to block lists (also known as Real-time Blackhole Lists or RBLs). You can also create your own Global Accept and Global Deny lists.

Third-party RBL providers include the Distributed Server Blackhole List (DSBL) and Mail Abuse Prevention System (MAPS).

There are always a variety of third-party software and hardware solutions that you can obtain that are equally as effective and come with more bells and whistles.

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Related information from SearchExchange.com:

  • Learning Guide: How to fight spam on Exchange Server
  • Crash Course: Exchange Intelligent Message Filter
  • Tip: Configure an Edge Transport server to filter spam
  • Tutorial: How to protect Exchange Server from spam blacklists
  • Reference Center: Antispam software and spam filtering resources
  • This was first published in September 2007

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