This book is a practical guide to understanding and working with this proven Java/JSP based content management system, and takes you through the process of creating content rich web sites and applications using OpenCms. Although powerful and flexible, OpenCms can be daunting on first approach, but its advanced features reward the investment in learning. With hard-won experience of the practical difficulties faced by developers working with OpenCms, this book is the embodiment of the author's expertise, and is the perfect way for Java developers to master this powerful, free system. 1904811124 This book is an in-depth guide to implementing antispam solutions using SpamAssassin. 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 helps you set up and optimize SpamAssassin specifically for your own network. You'll go from a detailed walk through of the 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.