Gnus
Gnus is a message reader running under GNU Emacs and XEmacs. It supports reading and composing both news and e-mail. In addition, it is able to use a number of web-based sources as inputs for its groups.Gnus users find it pleasing to have a system which offers consistent interface between Usenet news and e-mail messages, not to mention the use of their favorite editor (X)Emacs for writing messages. Number of features Gnus offers probably outweighs that of any other Mail/News reader.
Some Gnus features:
- simple or advanced mail splitting (automatical sorting of incoming mail to user-defined groups)
- incoming mail can be set to expire instead of just plain deletion
- custom posting styles (eg. From address, .signature etc)
- virtual groups (eg. directory on the computer can be read as a group)
- message scoring
- user-defined hooks for almost any method (in emacs lisp)
- many of the parameters (eg. expiration, posting style) can be spesified individually for all of the groups