The Cisco Spam & Virus Blocker is a dedicated antispam, antivirus, and antiphishing security appliance that virtually eliminates email threats right out of the box - and it's so effective it has a 30-day money-back guarantee.

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• Precision accuracy: Helps ensure that email threats and spam are caught and business email is delivered. Cisco Spam & Virus Blocker has a spam catch rate of 99 percent and false positives rate of less than 1 in 1 million.
• Continuous automatic updates: Constant communication with SenderBase services, a network database of email security threats, helps ensure that your Cisco Spam & Virus Blocker installs the latest updates to protect your business email.
• Easy installation and use: Simple browser-based setup wizards allow installation in nearly any network within 15 minutes.
• Effortless management: From the moment the appliance is installed, you get effective spam protection that requires no additional effort from you or your staff
  
  (source: cisco.com)