1)   602LAN SUITE 2004.0.07.0305 Secure mail server with anti-virus & anti-spam, built-in firewall with NAT and real-time web content filter proxy for controlled Internet sharing. Access your e-mail anywhere using the included web mail client. 2)   mxORB 2.2.3 mxORB is a server-side spam filter that consistently blocks over 98% of unsolicited commercial email (also known as spam) at a fraction of the cost of other filtering solutions. 3)   ORF Enterprise Edition 2.1 ORF Enterprise Edition is an enterprise-level anti-spam solution that helps you to block spam before it reaches your network. ORF uses a combination of anti-spam technologies to stop the spam on SMTP protocol level. 4)   SpamSquash 2.0.1 SpamSquash is a spam filter that uses two methods for filtering, a Bayesian filter and DNS black lists. It's used with a third party pop3 email client, such as MS Outlook and Pegasus Mail. It also includes white and black lists. Gets over 99%.