Sylpheed

Sylpheed is a simple, lightweight, featureful and easy to use e-mail client. Sylpheed provides intuitive user-interface. Sylpheed is also designed for keyboard-oriented operation. Sylpheed runs on many systems such as Windows, Linux, BSD, Mac OS X and other Unix-like systems. Sylpheed uses GTK+ GUI toolkit. Some of the features are spam filtering, plug-ins, high reusability, and junk mail control.