Chapter 5: Blocking spammers with DNS blacklists

This chapter from the book The Anti-Spam Tool Kit explains what DNS blacklists are, how they work and how to implement them on a mail server.

DNS blacklists are an integral part of any spam-fighting toolkit. That fact that many users on the Internet are updating them means that you get the benefit of blocking a spammer before the first piece of spam even hits you.

This chapter from the book The Anti-Spam Tool Kit by Paul Wolfe, Charlie Scott and Mike Erwin, explains what DNS blacklists are, how they work and how to implement them on a mail server. The chapter also discusses how to decide which DNS blacklist is the best to use for your organization's circumstances.

Click here to download this free book chapter.

This was first published in September 2004

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