nmh binary package in Ubuntu Oracular amd64

 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.

Source package