+The `\-build' switch is intended to be used by the Emacs mh-e interface
+to \fInmh\fR, and is only present if \fInmh\fR was compiled with support
+for mh-e. It implies `\-nowhatnowproc'. It causes a file <mh\-dir>/reply
+to be created, containing the draft message that would normally be presented
+to the user for editing.
+No mail is actually sent. Note that this switch is not guaranteed to
+be present or to have the same effects in future versions of \fInmh\fR:
+it is documented here only for completeness.
+
+The `\-file\ msgfile' switch specifies the message to be replied to as an
+exact filename rather than as an \fInmh\fR folder and message number. It is
+intended to be used by the \fImsh\fR\0(1) interface to \fInmh\fR.
+The same caveats apply to this option as to the `\-build' switch.
+