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:
* The recursive download of remote folders was enabled.
* The quick search condition for each folder now persists between sessions.
* The selection now persists when the quick search condition is updated.
* SSL ports in Advanced tab of the account prefs dialog are now automatically set when SSL is enabled.
* The "--open" command line option which open messages in new window was added.
* Quoted-printable or base64 encoding is now forced on PGP/MIME signing instead of stripping trailing spaces (except for the case of ISO-2022-JP encoding).
* The quoted-pair in From header is now processed correctly when displaying its name.
* The performance of "Mark all read" on IMAP folders was improved.
* The bug that the character "+" in address was treated as URI-escaped space was fixed.
* Unix: the problem that "Get" and "Get all" button could not be clicked after receiving while mouse pointer was over the buttons was fixed.