Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client (mailer, MUA).
* The new filter match type 'is in addressbook' was added. This can be used from filtering, query search and quick search.
* The new account setup dialog was implemented. It also supports easy Gmail setup.
* The address completion was modified.
* The spell-checking and PGP settings are preserved for draft messages now.
* The crash problem when trying to check PGP signatures while GnuPG was not available was fixed.
Tools and Utilities
3.0 beta 8
Product page: here