mh-pipe-msg
mh-pipe-msg is an interactive autoloaded Lisp function in `mh-funcs.el
'.
(mh-pipe-msg COMMAND INCLUDE-HEADER)
Pipe message through shell command COMMAND.
You are prompted for the Unix command through which you wish to
run your message. If you give a prefix argument INCLUDE-HEADER to
this command, the message header is included in the text passed
to the command.