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.

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: Learn more.