(mush) A mua for unix and ms-dos. It has both line-mode and full-screen interfaces as well as a sunview interface.

mush provides a very powerful shell interface with a csh-like scripting language, plenty of environment variables, command-line aliases, filename completion, conditionals, and command piping.

z-mail is a more recent commercial version of mush.

usenet newsgroup: news:comp.mail.mush.