Written specifically for busy network and system administrators, the book is a detailed and practical guide to implementing the right antispam solution for your network and your business requirements. You'll go from a detailed walk through of initial set up, to advanced configuration options like Bayesian filtering, listing, rewriting, and rules. The book shows how to optimize SpamAssassin for all major mail servers and clients. 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.