Comprehensive Anti-Spam Service SonicWall Comprehensive Anti-Spam Service (CASS) offers small- to mediumsized businesses comprehensive protection from spam and viruses, with instant deployment over existing SonicWall firewalls. CASS speeds deployment, eases administration and reduces overhead by consolidating solutions, providing one-click anti-spam services, with advanced configuration in just 10 minutes. CASS offers complete inbound anti-spam, antiphishing, anti-malware protection and features, SonicWall Capture Threat Network IP Reputation, Advanced Content Management, Denial of Service prevention, full quarantine and customizable per-user junk summaries. Outperforming RBL filtering, CASS offers >99% effectiveness against spam, dropping >80% of spam at the gateway, while utilizing advanced anti-spam techniques like Adversarial Bayesian™ filtering using advanced detection techniques like Adversarial Bayesian and machine-learning filtering.