Balsa is a GNOME email client that supports mbox, maildir, and mh local mailboxes, and IMAP4 and POP3 remote mailboxes. You can send mail via sendmail or SMTP. Optional multithreading support allows for non-instrusive retrieval and sending of mail. It also has an address Book that integrates with GnomeCard, support for multiple character sets for composing and reading messages, and GPG/OpenPGP mail signing and encryption. Read more hot
Claws Mail is a GTK+ based, lightweight, and fast email client. It supports POP3, APOP, IMAP, SMTP, SMTP AUTH, NNTP, LDAP. Features multiple accounts, spell-checking, address book, SSL, GPG/PGP, filtering, scoring, i18n, & more. Read more hot
The most popular groupware client for Linux, Novell Evolution integrates e-mail, calendaring, tasks and contact management in one easy-to-use application. As part of Novell Linux Desktop, Novell Evolution integrates smoothly with other applications and communications tools and connects to corporate communications architectures including Novell GroupWise and Microsoft Exchange. Novell Evolution embraces mail, calendar and address book standards to ease data sharing. Supported mail protocols include IMAP, POP, SMTP and Authenticated SMTP, as well as Microsoft Exchange 2000 and 2003. Novell GroupWise support is currently in beta. iCalendar support allows users in disparate collaboration servers to share meeting information, publish this information and subscribe to calendars published on the Web (webcal). Lightweight Directory Access Protocol (LDAP) support enables users to access their existing company address books. Users can also share contact information using vCard message attachments. Read more hot
Geary is a email client for Gnome which comes with a simple and organized user interface to read emails. Read more hot
Mozilla Thunderbird is a redesign of the Mozilla mail component. Our goal is to produce a cross platform stand alone mail application using the XUL user interface language. Highlights include: The ability to customize your toolbars the way you want them. Choose View / Toolbars / Customize inside any window, UI extensions can be added to Mozilla Thunderbird to customize your experience with specific features and enhancements that you need, downloadable themes, an addressing sidebar for mail compose which makes it easy and convenient to add address book contacts to emails, and more. Read more hot
Sylpheed a GTK+ based, lightweight, and fast e-mail client. The appearance and interface are similar to some popular e-mail clients for Windows, such as Outlook Express, Becky!, and Datula. The interface is also designed to emulate the mailers on Emacsen, and almost all commands are accessible with the keyboard. Read more hot
Cronos II is a MUA (or Mail Client) written from scratch over the GNOME library using C. This MUA is intended to be fast, light and powerful. It has support for POP3, Spool, SMTP, Plugins and many other protocols and features.
Another Gnome Email Client - an experiment in a sql vfolder based email system. It implements sql vfolders, incoming POP3, outgoing SMTP and more
GSendMail is a simple standalone mail composition tool for Unix. It lets you fill in From, To, CC, and Subject, and compose a text/plain message in a fixed-width text area with word-wrap. It does a fair amount of sanity checking, but other than that, it is frill-free: no HTML, no attachments, no address book.
gtkmail is a GUI email client for X, written in C++ using the gtkmm widget set. It is fully MIME compliant, and supports standard UNIX mbox style mail files.
Mahogany is an OpenSource cross-platform mail and news client. It is available for X11/Unix and MS Win32 platforms, supporting a wide range of protocols and standards, including SMTP, POP3, IMAP, NNTP (including SSL support for all of them) and full MIME support.
MMC is a Mail Client, written in C++, for Gnome. Features include: a single window interface, two pane view for multiple mailboxes, POP3 & SMTP support.
paranoy is a fast, light, open-source but overall safe mail client. It includes ssl and gpg support, it saves encrypted mailbox and configuration files. It has a text mode interface based on ncurses and a graphical one based on gtk.
Pronto! is a highly modularized GTK Mail Client written in Perl that features full MBOX and QMaildir support. It has Multiple POP3 Account support, very configurable and hyperlinks that work.
Pygmy is a GNOME mail client written in the Python programming language. Pygmy supports attachments and MIME messages, both in the message composer and in the message viewer. Yet, Pygmy is still pretty basic and will be most suitable for users that do not process more than 10-20 messages per day.
An X11 mail user agent (commonly known as an email client) written with the Gtk+ widget set. It is geared towards being extremely small and fast, supporting all the common features that users want or need without sacrificing usability or functionality.
A MUA (mail user agent), written in Python, that stores all of its messages in a MySQL database, using Gnome. It can handle very large mail databases (>10000 messages) very quickly and easy, and can create VFolders based on SQL queries to painlessly sort your mail archive.
TradeClient is a fully featured E-Mail client with support for SMTP, POP3, Full IMAP, LDAP support for a global address book (anonymous and authenticated) unlimited private address books, todo lists, a personal calendar, spell checking support.
After one year without development of the XForms based Unix email client XFMail, the coding has started again. The GTK is supposed to be the toolkit of choice and so we will take XFMail's core, restructure it, and port it to the Gimp ToolKit.