nmh

This is the nmh mail user agent (reader/sender), a command-line based mail reader that is powerful and extensible. nmh is an excellent choice for people who receive and process a lot of mail. Unlike most mail user agents, nmh is not a single program, rather it is a set of programs that are run from the shell. This allows the user to utilize the full power of the Unix shell in coordination with nmh. Various front-ends are available, such as mh-e (an emacs mode), xmh, and exmh (X11 clients). nmh was originally based on MH version 6.8.3, and is intended to be a (mostly) compatible drop-in replacement for MH.

mailutils-mh

GNU Mailutils is a rich and powerful protocol-independent mail framework. It contains a series of useful mail libraries, clients, and servers. These are the GNU mailutils MH utilities. It is an implementation of MH, a collection of small shell programs to read and handle mail in a very flexible way.

mmh

This is the mmh mail user agent (reader/sender), a command-line based mail reader that is powerful and extensible. nmh is an excellent choice for people who receive and process a lot of mail. Unlike most mail user agents, mmh is not a single program, rather it is a set of programs that are run from the shell. This allows the user to utilize the full power of the Unix shell in coordination with mmh. Mmh is a modified version of the electronic mail handling system nmh. Nmh (new MH) itself was originally based on the package MH-6.8.3, and was intended to be a (mostly) compatible drop-in replacement for MH. In contrast, mmh is not intended to be a drop-in replacement for nmh, rather mmh breaks compatibility to nmh in order to modernize and simplify it.

mailutils

GNU Mailutils is a rich and powerful protocol-independent mail framework. It contains a series of useful mail libraries, clients, and servers. This package contains the GNU mailutils versions of dotlock, frm, from, maidag, mail, messages, mimeview, movemail, readmsg and sieve. They are capable of speaking POP3, IMAP, mbox, MH and Maildir. dotlock -- lock mail spool files. frm -- display From: lines. from -- display from and subject. maidag -- the mail delivery agent. mail -- the standard /bin/mail interface, mail sender and reader. messages -- count the number of messages in a mailbox. mimeview -- display files, using mailcap mechanism. movemail -- move messages across mailboxes. readmsg -- extract selected messages from a mailbox. sieve -- a mail filtering tool.