The command M-d (mh-redistribute) is similar in function
to forwarding mail, but it does not allow you to edit the message, nor
does it add your name to the ‘From:’ header field. It appears to
the recipient as if the message had come from the original sender.
When you run this command, you are prompted for the recipients.
For more information on redistributing messages, see
dist(1). Also investigate the command e
(mh-edit-again) for another way to redistribute messages
(see Editing Old Drafts and Bounced Messages).
The option mh-redist-full-contents-flag must be turned on if
dist33 requires the whole letter for redistribution,
which is the case if send34 is compiled with the BERK option (which many
people abhor). If you find that MH will not allow you to redistribute
a message that has been redistributed before, turn off this option.
The hook mh-annotate-msg-hook is run after annotating the
message and scan line (see Sending Mail).
See the section Distributing Messages with dist in the MH book.
See the section Sending Some Mail: comp send in the MH book.