Spam filtering with GNU/Linux, Postfix, procmail, and SpamAssassin

Wednesday, 15 October 2003, 1:58 PM EST

With GNU/Linux and some new and old favorites you can reduce the amount of email spam your customers, employees, and personal mail readers receive. This step-by-step guide shows you how to install procmail and SpamAssassin and how to configure the Postfix mail transport agent to mark potential spam before it reaches your mail program.

Before we begin, be sure you have Postfix running properly and receiving mail for all of your domains. If you are running an ISP, are the systems administrator for a company, or are modifying the behavior of a mail server that many people depend on, make sure you let your users know in advance that changes are in the works and who to contact should something go wrong.

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