NAME
          maildir2mbox - move mail from a maildir to an mbox

     SYNOPSIS
          maildir2mbox

     DESCRIPTION
          maildir2mbox moves mail from a maildir-format directory to
          an mbox-format file.

          You must supply three environment variables to maildir2mbox:
          MAILDIR is the name of your maildir directory; MAIL is the
          name of your mbox file; and MAILTMP is a temporary file that
          maildir2mbox can overwrite.  MAILTMP and MAIL must be on the
          same filesystem.

          maildir2mbox is reliable:  it will not remove messages from
          MAILDIR until the messages have been successfully appended
          to MAIL.

          maildir2mbox locks MAIL to protect against simultaneous
          access by a mail reader.  This locking system does not
          protect against simultaneous access by another maildir2mbox;
          you should run only one maildir2mbox at a time.

     SEE ALSO
          maildir(5)