Spam has become an intricate, sophisticated business. To address the spam problem, enterprises should consider acquiring an anti-spam product to complement an existing legacy installation. In this way, the content-filter can perform in the areas for which it was originally designed - to classify content - and the advanced anti-spam technology can tackle the increasingly complicated task of blocking spam.

To be effective, anti-spam solutions must:

• Offer an extremely high detection rate
• Be able to recognize all types of spam
• Provide real-time protection
• Automatically and quickly adapt to spam evolution

This paper reviews the ever-changing spam business and details how Commtouch provides a proficient anti-spam solution with its Unique Recurrent Pattern Detection (RPD(tm)) Technology. RPD(tm) Technology detects recurrent patterns, classifies those patterns in real-time, and matches incoming messages against the spam outbreak database in real-time. Commtouch RPD technology is a perfect companion to complement and enhance any existing content-based solution - covering the blind spots effectively and efficiently.