Quick Spam Filter (qsf) is a small, fast spam filter that works by learning
to recognise the words that are more likely to appear in spam than non-spam.
It is intended to be used in a procmail recipe to mark email as being
possible spam.
Junk Mail Buffering Agent is a tool for preventing delivery of email until the
sender has confirmed their address. It can be used in conjunction with a spam
filter to prevent delivery of spammy-looking email unless the sender is
confirmed as valid.
jmba is designed to be used in conjunction with a spam filter such as QSF and
the mail processor procmail. When the spam filter says it thinks an email is
spam, it can be passed to jmba. jmba will queue it and send an email to the
sender containing a key; if the sender replies, the original email is
"unfrozen" from the queue and delivered.
Rspamd is fast, modular and lightweight spam filter. It is designed to work
with big ammount of mail and can be easily extended with own filters written in
lua. This port provides development version of rspamd.
Rspamd is fast, modular and lightweight spam filter. It is designed to work
with big ammount of mail and can be easily extended with own filters written in
lua.
spamass-milter is a plugin for the Sendmail Milter (Mail Filter) library
that pipes all incoming mail (including things received by rmail/UUCP)
through the SpamAssassin, a highly customizable spam filter.
Bayespam is a qmail spam filter written in Perl, using Bayesian
classification to filter out unsolicited commercial email. It is
written with ease of installation and use in mind, and it is
encouraged that you give it a try. Bayespam actually learns as you
give it more spam to process, so it should become better and better
the longer you use it.
Bayespam is based on a paper written by Paul Graham called A Plan
for Spam. In this paper, Mr. Graham talked about a spam filter he
is working on that used Bayesian classification to determine if a
particular piece of email is spam or not.
SpamBayes is a tool used to segregate unwanted mail (spam) from the mail you
want (ham). Before SpamBayes can be your spam filter of choice you need to
train it on representative samples of email you receive. After it's been
trained, you use SpamBayes to classify new mail according to its spamminess
and hamminess qualities.
iXhash is a plugin for the popular spam filter SpamAssassin.
It computes MD5 checksums of fragments of the body of an e-mail and compares
them to those of know spam. As such it works similar to the now standard
plugins that use the Pyzor, Razor and DCC software packages from within
SpamAssassin.
bsfilter is a spam filter using Bayesian(statistical) algorithm.
- a filter which distinguishes spam and non-spam mail
- support mails written in English and Japanese language
- written in Ruby
- support 3 methods for access
-- traditional Unix-style filter. study and judge local files or pipe
-- IMAP. study and judge mails in an IMAP server. IMAP over SSL supported
-- POP proxy. run between POP server and MUA. POP over SSL supported
- distributed under GPL
Greylite is a SPAM filter with exceptional effectiveness and without false
positives. It combines natively with qmail and works as a proxy for any SMTP
server.
It implements a modified greylisting algorithm that improves the filtering
effectiveness and minimizes the delay drawbacks associated with the standard
greylisting algorithm.
It can be tuned to recognize suspicious clients and reject their attempts
multiple times, reaching filtering rates of over 99% without false positives.
Greylite is easy to setup and maintain, and it is small and fast.