SonicWall Comprehensive Anti-Spam Service (CASS) provides powerful, real-time email filtering to protect organizations from spam, phishing, malware-laden messages, and other email-based threats. Designed to run directly on SonicWall firewall and email security appliances, CASS filters inbound email at the network level, helping prevent threats before they reach user inboxes or internal servers. Leveraging SonicWall's cloud-based threat intelligence and IP reputation database, this service identifies and blocks threats with minimal latency. It works silently in the background, reducing server strain and improving email performance while also enforcing email hygiene policies. Ideal for small to mid-sized businesses, CASS requires no additional hardware or client software and is backed by 24x7 support and automatic threat signature updates, keeping your organization protected without disruption. Note: This license is for SonicWall's anti-spam service only. Requires a compatible SonicWall firewall or email security appliance. Please verify licensing compatibility and duration before purchase.