SMTPTracker SMTPTracker extends your SMTP server with message tracking, content saving, sql logging and anti-spam abilities, Active Directory integration, SpamAssassin to Exchange2003 SCL header conversion support.
mxORB 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.
602LAN SUITE 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. The 5 user version is FREE.
ORF Enterprise Edition 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.
SpamSquash 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%.
Anti-Spam Blacklist Thing Anti-Spam Blacklist Thing lets you check to see if a given IP address or hostname is on one of up to 20 different anti-spam blacklists. Anti-Spam Blacklist Thing is provided by SpamButcher completely free of charge.
