SpamAssassin

Use this program to "Unspam" your mailbox(es). The program can be integrated with the mail server to automatically filter all mail for a site. It can also be...

Free Open Source Linux

MailScanner

MailScanner is a open source email security system design for Linux-based email gateways. It is used at over 30,000 sites around the world, protecting top government departments, commercial corporations and educational institutions.

Free Open Source Linux

Xeams

Xeams is a secure & powerful mail server for Windows, Linux, Solaris, MacOSX and other flavors or UNIX, which supports SMTP, POP3, and IMAP. It includes a powerful...

Free Personal Mac OS X Windows Linux BSD

Symantec Messaging Gateway

Anti-spam gateway blocks more than 99% of spam with less than one in 1 million false positives and real-time automatic updates. Antispam filtering engine powered by...

Commercial Windows

Proxmox Mail Gateway

Proxmox Mail Gateway helps you protect your business against all email threats like spam, viruses, phishing and trojans at the moment they emerge. The flexible...

Commercial Linux Self-Hosted