Intent based filtering technology. Simply better e-mail. You plug it in, and all that junk email just goes away. [Hardware]

MailShield filters e-mail before it gets to the mail server. Customizable. Free trial available. [Unix, Windows]

The Barracuda Spam Firewall handles over 10 million messages a day, without bogging down your email servers. [Hardware]

Prevents SMTP hijacking (outgoing spam) of the respective MX SMTP Server from anonymous Dial-In Users. [Unix]

Makers of modusGate and modusMail secure email solutions for businesses and service providers. Products, services and client list.

Advanced spam control using many different tests with a variety of possible actions to take on spam. [Windows]

CanIt is a flexible server-based anti-spam solution built around SpamAssassin. [Unix]

MailChannels eliminates false positives by using a new technique using subdomains in E-mail addresses. [Windows]

Appliance filters mail coming into your network for spam and dangerous content. [Hardware]

An internet security company offering solutions to prevent spam, phishing, viruses, policy violations, and denial of service attacks. [Hardware]