The Barracuda Spam & Virus Firewall is an integrated hardware and software solution designed to protect your email server from spam, virus, spoofing, phishing, and spyware attacks. The Barracuda Spam & Virus Firewall is compatible with all email servers and can fit into nearly any corporate or small business environment. With no per user license fees, the Barracuda Spam & Virus Firewall offers the most affordable spam and virus protection available.