mh-next-msg

mh-next-msg is an autoloaded compiled Lisp function in `mh-folder.el'.

(mh-next-msg &optional WAIT-AFTER-COMPLAINING-FLAG)

Move backward or forward to the next undeleted message in the buffer.
If optional argument WAIT-AFTER-COMPLAINING-FLAG is non-nil and
we are at the last message, then wait for a second after telling
the user that there aren't any more unread messages.