Spam has become a serious problem for businesses, wasting employees time and costing millions of dollars. To combat this growing problem, a number of applications and services have been developed, and SpamAssassin is one of the most effective and popular open source solutions. Free to use, flexible, and effective, SpamAssassin has become the most popular open source antispam application. Its unique combination of power and flexibility make it the right choice. This book will now help you set up and optimize SpamAssassin for your network. As a system administrator, its down to you to implement, configure, and adapt SpamAssassin to fight the Spam War. Fortunately, in SpamAssassin you chose well. Its power and flexibility make it a potent tool. However you also know that any flexible application is only as good as how its set up and configured. This book is a comprehensive guide to the features, options, and implementation strategies you need to get the most of out SpamAssassin. If you are a network or system administrator and you"re either using or evaluating SpamAssassin, this book will increase your understanding and transform your productivity.