The book MH & xmh: Email for Users & Programmers, ISBN 1-56592-093-7, written by Jerry Peek, was published by and is copyright © 1991, 1992, 1995 by O'Reilly & Associates, Inc. In June, 1996, ORA made the book freely available under the terms of the GNU General Public License; please read the information about copying and distribution. (Here's a picture of the printed book cover).
The book is available online at the servers below. (Note that most Web browsers can also use an FTP server interactively, though Web servers tend to give better performance.)
Updated online edition:
[Go to Book Home Page (on your current server)]
Suggestions are welcome: Jerry Peek