Barracuda Networks :

Barracuda Networks is the worldwide leader in plug and play appliances that protect email infrastructure. Winner of numerous industry honors, including Network Computing's Editor's Choice Award and the 2004 Well-Connected Award, our flagship product, the Barracuda Spam Firewall, provides spam and virus protection for over 10,000 customers around the world. Customers include Adaptec, Barnes & Noble, CBS, Coinstar, Europcar, Forbes, Georgia Institute of Technology, IBM, NASA, North Carolina Highway Patrol, Pizza Hut, Union Pacific Railroad, and the U.S. Treasury Department

http://www.barracudanetworks.com/products/