Open Source Server Operating Systems Email Clients

Trojitá, a Qt IMAP e-mail client

MultiMail is an offline mail packet reader for Unix and other systems. It currently supports the Blue Wave, QWK, OMEN, OPX and SOUP formats. It has a full screen, color user interface, built with the curses library.

Eclipse Mail is a fork of Interlink Mail and News made for Windows XP and runs on IA-32 i686 platforms. Some advantages over upstream and roytam1's mailnews are more optimizations and better interoperability with upstream. (using SQL storage intead of DBM)

Free and easy-to-use webmail script with AJAX interface. Supports POP3/IMAP accounts, SMTP, SSL. Users can check and send mail, use address book. Skins, non-English languages, UTF-8. MS SQL/MySQL/MS Access backends supported.

Draconis is a suite with several Internet Programs for the ATARI platform. It contains clients and drivers for a sucessful internet access.

EGroupware has moved to Github, please find all our downloads there: https://github.com/EGroupware/egroupware/releases EGroupware is a multi-user, web-based groupware suite. Currently available modules include: email, addressbook, calendar, infolog (notes, to-do's, phone calls), content management, wiki, project management, tracker, timesheet, knowledge base, CalDAV/CardDAV

Magic Spell, a mail client with POP and IMAP support and multiple interfaces.

An email client written in Java, C, and C++ which not only allows standard pop/smpt/imap access, but also integrated access to Yahoo!, Hotmail, Lycos, and many others. This is all done without any additional services (such as pop forwarding).

Hey Everyone! Nirvana has moved to http://sourceforge.net/projects/nirvana It isn't here anymore.

OpenChange is a portable Open Source implementation of Microsoft Exchange server and Exchange protocols. It provides a complete solution to interoperate with Microsoft Outlook clients or Microsoft Exchange servers. OpenChange client-side library is used in existing messaging clients and is the solution in new projects to communicate natively with Microsoft Exchange and Exchange-compatible servers. OpenChange server is a transparent Microsoft Exchange server replacement using native Exchange protocols and does not require any plugin installation in Outlook.

This e-mail notifier is a notify you when an e-mail is set in the accounts setup in the Accounts tab and sits in your tray checking your e-mail account every 15 minutes or less. You can have multiple e-mail accounts setup to check them all at once.

Enhanced packages of Mozilla products for OS/2 and eComStation.

Webmail project, based on the original UebiMiau, that uses the newer smarty template engine, better optimized, have export / import of addressbook, most things rewritten, many new features.

A better Webmail Interface for MailEnable.

YAM (short for Yet Another Mailer) is a commonly used MIME-compliant Internet mailer written for AmigaOS computers. It supports POP3, SMTP, TLSv1/SSLv3, multiple users, PGP, hierarchical folders, filters, a configurable GUI, an ARexx interface and more...