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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, ...
Ruby script framework for the encryption and decryption of email according the GPG/MIME Format (RFC 3156). It can be used for e.g. for Apple' Mail as replacement for GPGMail.
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GOSSiP is a P2P email reputation system. It uses social networking theory to track email sender spam behavior worldwide. Writtten in C and Perl, GOSSiP has compiled on Linux, Solaris, FreeBSD, and OS X. Works with multiple mailservers and spam filters.
SPAMSNAIL is a anti-spam filter dedicated to end-users with a slow / non permanent connection to their mail server. It is written in Perl and uses the Bayes system.
SPAM-Buster is a Java application for filtering SPAM based on statistical algorithms (currently Bayesian). The platform independant application can be used as graphical end-user client and additional service for mail server.
smm is a anti-spam, mail-shaper, delete-on-server software thought for users who have a slow dialup connection and are sick and tired of downloading 1MB a day of spam and Win32-worm-attached messages.
Dougal is a Free (LGPL) mail-washing program for the POP3 protocol, written in Perl. It supports any operating system that supports Perl 5.x and TCP/IP (Perl IO::Socket module).
Spaxy is a POP3 proxy for email classification. It includes robust filters based on booleans operators. Queries can analyze multipart and encoded (qp/base64) messages. For SPAM detection on most platforms (QT) and clients.
Spitman is a spam filter, written in python and intended for desktop use. It will fetch the mail from the mailserver and put this in a local file, wich your mail client can check.
Stop Spam - Fight back! Protect your own email address ard/or generate lists of fake email adresses for easy distribution on websites, weblogs or in newsgroups. This way we will pollute the spammers email-databases with a lot of trash...
A Perl script that you slip between your MTA (e.g. Sendmail) and your local mailer to remove executable (.EXE, .COM, .VBS, etc.) MIME attachments from email messages.
This project uses ICQ-style logic against a POP3 mailbox. Any incoming mail is checked against known users. Any not found can be either a) sent a "request authorization" form, b) ignored, or c) deleted.
Ardok Mail reader (ARM) is a mail checker written in perl/tk.
The main goal of the programm is to manage the mails sent on a pop3 server. But it can also be used to write and read mails (on the server or on the hard drive).
MAFIVIHE filters your mail box finding the mistakes that SPAM'ers leave on the message, like storing empty values on "To" field. GUI-based, it's not 100% automatic to prevent misunderstanding.
OzoneFarm is a eCommunity-building project aimed at promoting open source computing and distribution and generation of open content. The goals and strategies for forming the community are being discussed in an open forum.
ProcLog is a simple to use set of scripts to generate reports against your procmail log file. Proclog reports various statistics and can be run from the command line or as a X Windows GUI.
Mail Receipt is a collection of utilities used to seed, receive, and summarize email receipts to be sent by HTML enabled mail readers without the mail recipeient's knowledge.
Dirt eater automatically scans and scores E-Mails and/or websites for interesting content and notifies a group/person about the found content via E-Mail or Jabber.