Etpan is a textmode based mailreader similar to mutt.

features:
* imap4rev1 / pop3 / nntp / mbox / mh / maildir
* virtual folder tree
* multiple folder views and message views
* smart multi-threading
* pgp signing and encryption (using gnupg as external command)
* s/mime signing and encryption (using openssl as external command)
* spam process (using bogofilter as external command)
* user interface for configuration edition