The purpose of movemail, as its name implies, is to move mail from one location to another. For example, the following invocation:
movemail /var/mail/smith INBOX
moves messages from file /var/mail/smith to file INBOX.
You will probably never have to run this program manually. It is
intended as a replacement for movemail from GNU Emacs. The
movemail program is run by Emacs Rmail
module. See Rmail, for detailed
description of Rmail interface.
Mailutils version of movemail is completely
backward-compatible with its Emacs predecessor, so it should run
flawlessly with older versions of Emacs. Emacs version 21.4, which is
being developed at the time of this writing, will contain improved
Rmail interface for work with mailutils movemail.