mailbox synchronizer
Fast Bayesian spam filter along lines suggested by Paul Graham
C library for sending e-mail (with attachments) from C/C++
Anti Spam SMTP Gateway
Email reader for RISC OS operating system.
Gross greylisting server
Remote anti spam utility
software for email automation (newsletters, transaction mails, etc.)
one server framework
Petidomo is a small, easy-to-administer mailing list server
The free cross-platform antivirus software tool-kit
A Scalable Spam Filtering Architecture
Outgoing email rate limiter