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Fast Bayesian spam filter along lines suggested by Paul Graham
The bogofilter package implements a fast Bayesian spam filter as
suggested by Paul Graham in "A Plan For Spam"
<http://www.paulgraham.com/spam.html>. It is written in C. Supported platforms: Linux, FreeBSD, Solaris, OS X, HP-UX, AIX, RISC-OS, ...
Quick Spam Filter 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.
Sortmail is a program to process incoming email, classify it and
process it accordingly. Sortmail can handle incoming email as it
arrives or download from a POP server. Sortmail is easier to
configure than procmail and can replace fetchmail.
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dbacl is a general purpose digramic Bayesian text classifier. It can learn text documents you provide, and then compare new input with the learned categories. It can be used for spam filtering, or within your own shell scripts. Sometimes it plays che
Tools for a mail delivery service, including LMTP and POP3 servers and also getpwnam() emulation. Mail is stored in Maildir++ format (qmail plus courier extensions as soft quota and subfolders). User defined filter and virtual domains are supported.
This version is no longer maintained here, please see www.firetrust.com for the latest versions
MailWasher Server is a highly accurate server-side spam filtering package with a polished, well-integrated web interface and built-in quarantine management facilities. Fully supports Windows Server/Exchange Server, Linux and Solaris.
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dk-milter consists of two parts: A milter-based application (dk-filter) which plugs in to Sendmail to provide DomainKeys service, and a library (libdk) which can be used to build DomainKeys-compliant applications or MTAs. See the home page for details.
This package contains an Open Source plug-in, for use with Open Source or commercial sendmail MTAs, which implements and enforces the merged Caller-ID/SPF specification from the IETF MARID working group, currently dubbed "Sender-ID".
qSheff is a wrapper for the qmail queue that scans email for viruses and spam. It is simple and powerful. It features the ability to quarantine, nice logging, subject filtering, body filtering, attachment blocking, a blackhole and white/black lists.
g-milter, or "guerilla milter", is an open source filter for restricting arriving mail not checked by existing filters due to standards compliance. Running this will catch more spam but almost certainly violates e-mail standards. Requires sendmail.
Fast, intelligent, automatic spam detector using Paul Graham style Bayesian analysis of word counts in spam and non-spam emails. Filtering adapts to personal tastes automatically. No manual rule creation required. Intended for use with procmail, maild
Spammer is an anti-spam mail filter for Sendmail and Postfix. It uses libmilter to communicate with the MTA. Spammer checks client IP addresses as well as all IP addresses in the "Received: " headers against a DNSBL database.
dkfd is a DomainKeys filter daemon using libdomainkeys library. targeted usage is SMTP proxy of Postfix MTA. Currently developing under Linux/FreeBSD, and Solaris.
YamExpansion is a YAM 2.0 plugin to handles emails from the Aminet mailing list. You can view in a GUI the uploaded files, select your favourite files and then make an ftp-mail, or a WGet script, or an AmFtp batch file, or an HTML file.
emailsoap is a Sendmail Milter designed to alter email subject headers.
Specifically, use it to look for offending words and replace them.
Essentially washing email's mouth out with soap.
This is an open-source implementation of Elegitimizer.com's "elegitisigner" specification. An easily implemented validation mechanism to help eliminate illegitimate e-mail or Spam. Elegitisigner features a well documented web of trust model.
SORBS - Spam and Open Relay Blocking System - NOT http://www.sorbs.net/ This project is to provide a SMTP proxy that automatically checks incoming SMTP connections for origination from a server with an unsecured SMTP server and/or Proxy server.
A Bayesian spam filter for SMTP servers, based on Paul Graham's "A Plan for Spam", http://www.paulgraham.com/spam.html. Includes tools for spam-database maintenance & testing config. parameters. Supports sendmail & postfix; others soon. GPL.
A small, fast, secure, anti-spam SMTP mail server (MTA). Delivery to mbox files and Maildirs supported. qwik-smtpd supports RBL, relay checking, raw/custom message handlers, and more. Custom authentication via checkpassword and a qmail-compatible configu
TLim (Transaction Limiter)
TLim is a patch that spam-hardens sendmail against both inbound and outbound abuse.
TLim counts the number of transactions an IP performs. Should the IP violate admin-defined limits, it is sanctioned via a null route.