Sylpheed
Lightweight, user-friendly email client.
Sylpheed is a free, open-source email client designed to be lightweight and user-friendly. It addresses the need for a reliable and efficient email application that performs well even with large volumes of messages, avoiding the sluggishness and complexity found in some other clients. The software is written in C and uses the GTK+ GUI toolkit.
Its main features include a three-pane display, support for POP3, IMAP4rev1, SMTP, and NNTP protocols, and a powerful filtering and search system. The client stores each message as a separate file in MH format, which enhances reliability and simplifies backup. It also offers junk mail control through external commands, GnuPG support for signing and encryption, and SSL/TLSv1 for secure communication. Sylpheed is extensible through plug-ins and can cooperate with external commands for tasks like filtering and receiving mail.
Sylpheed is intended for a wide range of users, from beginners to power users, and runs on Windows, Linux, BSD, Mac OS X, and other Unix-like systems. It is distributed as free software under the GNU GPL, with the library part under the GNU LGPL.
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