Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client (mailer, MUA). Sylpheed runs on Unix-like systems such as Linux, BSD, and Mac OS X. It also supports Windows. Sylpheed uses GTK+ GUI toolkit. The newest version of Sylpheed works with GTK+ 2.4 or later (2.6 or later is recommended). Sylpheed is a free software distributed under the GNU GPL (the library part is GNU LGPL). You can freely use, modify and redistribute it under the license.
Sylpheed has the following features:
* Simple, beautiful, and well-polished user interface
* Comfortable operationality which is built in detail
* Well-organized, easy-to-understand configuration
* Lightweight operation
* High reliability
* Internationalization and Multilingualization support
* High-level Japanese processing
* Various protocols support
* Security features (GnuPG, SSL/TLSv1)
* Powerful filtering and search
* Junk mail control
* Flexible cooperation with external commands
What"s new:
* In-Reply-To header was supported in mailto URL.
* Stop button was added to the main toolbar.
* An error message is displayed now when the decryption of PGP encrypted messages failed.
* Remote commands such as "compose", "receive" and "send" are disabled when a modal dialog exists.
* Process termination is forced after the execution of finalizer routine.
* The behavior of "Go to next unread" with changing folders was fixed.
* The sylpheed.desktop file was modified.
* Win32: A bug that the folder path separator was not processed correctly in some cases (fixes path information becoming incorrect on renaming subfolders).