Spam, and the tools used to create and filter it have evolved over time. There is a continuous evolution in the techniques used by both sides.
Anti-spam services are currently available for both individuals and small organizations.
SpamAssassin encompasses many of the current anti-spam tools and techniques in a single package, which is flexible and highly configurable by both system administrators and users. In this chapter, we covered the features of SpamAssassin in the context of anti-spamming ability and techniques used to prevent spam.