mailbox synchronizer
Fast Bayesian spam filter along lines suggested by Paul Graham
C library for sending e-mail (with attachments) from C/C++
secure, reliable, fast MTA
The free cross-platform antivirus software tool-kit
Converts quoted-printable, UTF-8, UTF-16BE, UTF16LE to 8-bit.
Tools to convert Z mark-up to HTML or text.
cab
OpenSource high performance mail policy daemon for Postfi
commandline multiclass email and text filter
an open source email archiving application
Rapid spam filtering system
Reports IP addresses via Email or MySQL