Mutt is a small, lightweight yet powerful text-based email client for Unix-like operating systems. It is feature-rich and some of its remarkable features include:
Easy to install
Color support
Message threading
Support for IMAP and POP3 protocols
Delivery status support
Supports several mailbox formats such as mbox, MH, Maildir, MMDF
Support for PGP/MIME (RFC2015)
Multiple message tagging
Various components to support mailing listing, including list-reply
Full control of message headers during composition
The active development community and many more
