BOOK MH and xmh

Title: MH and xmh
Subtitle: E-mail for users and programmers, Third edition
Author: Jerry Peek
Publisher: O'Reilly
Publication date: April 1995
ISBN: 1565920937
Pages: 782
Price: 34.95 US

Besides the obvious, this book also covered the Tk application exmh. According to the publisher, this book has been discontinued, but has now been made available under the GPL on the web.

The original O'Reilly book it is at: http://www.oreilly.com/openbook/mh/

Updated editions are at

This link may be useful as well: MH-E Manual