Barracuda Spam Firewall

The Barracuda Spam Firewall is an integrated hardware and software solution designed to protect your email server from spam, virus, spoofing, phishing and spyware attacks. It leverages 12 comprehensive defense layers to provide industry-leading defense capabilities for any email server within large corporate or small business environments. read more
link : http://www.barracudanetworks.com/ns/products/spam_overview.php