AMaViS - A Mail Virus Scanner
- A script that interfaces a mail transport agent (MTA) with virus scanners. Latest stable release is 0.3.12, 2003-03-06.
Add-ons Mirror - the "New" Extensions Site
- Extensions and themes for Firefox, Thunderbird, SeaMonkey, Flock, Nvu, and much more. Formerly called The Extensions Mirror @www.extensionsmirror.nl.
BasiliX - Your Mail Gateway
- A webmail application based on PHP and IMAP, and powered with the MySQL database server. Site available in English and Turkish.
Bill's Linux Qmail Toaster
- This HOWTO provides instructions on how to build a Qmail "toaster" and should work for the popular Linux distributions. (2006) Also available in Italian.
Bogofilter
- A mail filter that classifies mail as spam or ham (non-spam) by a statistical analysis of the message's header and content (body).
Bongo Project
- Easy-to-use mail and calendaring software. The goal of this project is to make sharing, organisation, and communication simpler, quicker, and more useful.
Claws Email - the Email Client that Bites!
- A user-friendly, lightweight email client based on GTK+. Latest version is 3.4.0, 2008-04-18. Formerly known as Sylpheed-Claws.
Courier Mail Server
- An IMAP and POP server; also a MTA server, a webmail application and a web administration interface. Latest version is 0.53.3, 2006-08-28.
Dovecot
- An open source IMAP and POP3 server for Linux/UNIX-like systems.
Exmh
- X user interface to MH mail. Latest release is 2.7.2, 2004-01-07.
Extension Room - Firefox, Mozilla and Thunderbird Extensions
- One of the best sites for accessing XUL-based extensions for Firefox, Mozilla, and Thunderbird; organized by broad subject category, each extension has a short description, install information and user comments.
Fetchmail Home Page
- A full-featured and robust remote mail retrieval and forwarding utility. Latest release is 6.3.8, 2007-04-06.
FreePOPs
- An extensible program that downloads mail from webmail portals through the POP3 protocol. It can also be used as an RSS/Atom aggregator. Also available in French, Italian, and Spanish. Latest release is 0.2.5, 2007-06-22.
GNUMail.app
- A fast mail application for GNUstep and Mac OS X.
Hashcash
- A denial-of-service counter measure tool; primarily a spam management tool using a hascash stamp, but also can be used for protecting wikis from defacement.
IlohaMail
- A full-featured, multi-lingual webmail program.
JAWmail
- A webmail client with support for MIME mail, address book, plugin system, different themes and many languages. Runs on PHP, MySQL and connects to IMAP servers. Latest stable release is 2.0.1, 2002-12-31.
KMail: Kontact Mail
- The email component of Kontact, the KDE PIM (Personal Information Management) suite.
KShowMail - the Human Spam Filter
- A POP3 mail checker for the KDE with these features: show number, size and more information about the mail messages on POP3 servers in a list view; show the mail headers or complete mail message, delete unwanted mail from the server by configurable filters. Latest stable release is 3.2.9.1, 2007-08-05.
Logicalware:mailmanager
- A cross-platform, multi-user system which organizes and centrally stores mail on a Zope database; can be run with many email clients.
Mahogany Mail
- Cross-platform mail and news client.
Mail 2 Forum (M2F)
- Add-on software to the phpBB forum system which combines the functionality of a mailing list system and a phpBB forum in order to add bi-directional communication.
Mailgraph Homepage
- A simple mail statistics RRDtool frontend for Postfix that produces daily, weekly, monthly and yearly graphs of received/sent and bounced/rejected mail.
Melon
- A simple utility that notifies the user for newly received emails, through a couple of configurable icons. An xbiff replacement. Latest release is 1.2, 2002-08-31.
Muttprint
- An application for printing out email using LaTeX.
NeoMail
- A web-based email client with multi-language support.
Novell Evolution 2
- An email client plus task lists, calendaring, and contact management functions.
Nuclear Elephant: DSPAM
- An anti-spam engine designed for system-wide filtering and third party integration; uses Bayesian statistical analysis to improve spam filtering success rates.
Open WebMail
- Open WebMail is designed to manage large mail folder files in a memory-efficient way. It also provides a range of features to help users migrate smoothly from Microsoft Outlook to Open WebMail. Originally based on Neomail version 1.14 from Ernie Miller. Latest release is 2.52, 2006-05-02.
PGPEnvelope
- An interface between Pine (email client) and the GNU Privacy Guard (GnuPG). Latest stable release is 2.10.2, 2001-05-11.
POPFile Home Page
- Automatic mail classification tool. Available in English, Norwegian, German, Portuguese (Brazilian), French, Spanish and Danish.
Paul Graham Home Page - Anti-Spam
- Numerous articles on spam by Paul Graham, plus links to spam resources and the annual Spam Conference.
Pine Information Center
- Pine (a Program for Internet News & Email) is one of the original email clients; developed by University of Washington. A great command-line email client with outstanding documentation.
Postfix Wiki
- A wealth of online resources about Postfix can be found here including the source code and excellent documentation.
Qmail
- This is the official website maintained by the Qmail developer.
Qmail-Scanner - A Content Scanner for Qmail
- Email content scanner that enables a Qmail email server to scan all email it receives for certain characteristics (normally viruses), and take action. Latest release: 2.00, 2006-04-03.
QmailAdmin
- A web interface for managing a qmail system with virtual domains.
Qmailrocks
- A comprehensive Qmail installation resource.
SYMPA - mailing list manager
- An open source mailing list software, which is highly customizable, easy to administer, and translated into 15 languages; latest stable release is 5.2, 2006-04-11.
Sendmail Home
- A mail transfer agent (MTA) that is a well-known project of the open source, free software and Linux/UNIX communities. Distributed both as free software and proprietary software.
Sendmail Home
- A mail transfer agent (MTA) that is a well-known project of the open source, free software and Linux/UNIX communities. Distributed both as free software and proprietary software.
SpamAssassin
- One of the more well-known, open source spam filtering programs for Linux and other operating systems. Latest stable release is 3.2.3, 2007-08-08.
SpamAssassin Wiki
- An information and wiki for SpamAssasin, an open source spam filtering programs for Linux and other operating systems.
SquirrelMail - Webmail for Nuts!
- A standards-based webmail package written in PHP. It includes built-in pure PHP support for the IMAP and SMTP protocols, and all pages render in pure HTML 4.0 (with no JavaScript required) for maximum compatibility across browsers. Available in many languages.
Sylpheed
- A lightweight and user-friendly e-mail client; available in English and Japanese. Latest stable version is 2.3.1, 2007-01-16.
The IMAP Connection
- A resource site for IMAP (Internet Message Access Protocol).
The MIMEDefang HOWTO
- A comprehensive guide to installing a Linux (or BSD derivative, or UNIX) system-based mail server with sendmail, MIMEDefang, spam filtering software, and anti-virus software. (2006)
The Postfix Home Page
- Modern and secure mail server software; a replacement for Sendmail. Check the documentation section -- it is excellent.
The SeaMonkey Project
- An all-in-one Internet apppliance suite which includes a Web browser, advanced e-mail and newsgroup client, IRC chat client, and HTML editing. It has excellent localization support. Latest release is 1.1.9, 2008-03-12. The successor to the Mozilla Application Suite.
The msmtp homepage
- A SMTP client that can be used as a SMTP plugin for Mutt and other MUAs (mail user agents).
The nmh - New Message Handler
- An email handling system that consists of a collection of simple, single-purpose programs to send, receive, save, retrieve, and manipulate email messages. Latest stable release is 1.2, 2005-12-20. Latest development release is 1.3, 2008-04-27.
The qmail Homepage
- A modern SMTP server; a comprehensive information site with lots of referring links.
Thunderbird Mail Project Page
- The Mozilla Thunderbird Mail Project is a a cross-platform standalone email client; a redesign of the original Mozilla email client.
VMailMgr
- Virtual MAIL ManaGeR is a package of programs designed to manage multiple domains of mail addresses and mailboxes on a single host; works with qmail for email delivery and control.
Vipul's Razor
- A distributed, collaborative, spam detection and filtering network.
Welcome to Dada Mail - Mailing List Manager
- A Web-based email list management system, which runs on any hosting account that can execute custom CGI scripts.Latest stable release is 2.10.15, 2007-06-26.
Welcome to SpamProbe - A Fast Bayesian Spam Filter
- A fast, intelligent, automatic spam detector using Paul Graham-style Bayesian analysis of word counts in spam and non-spam emails. Latest stable release is 1.4b, 2006-02-18.
XMail Home Page
- An Internet and intranet mail server with features such as an SMTP server, POP3 server, finger server, multiple domains, spam protection, and SMTP authentication.