(define-key map "n" 'notmuch-show-next-message)
(define-key map (kbd "DEL") 'notmuch-show-rewind)
(define-key map " " 'notmuch-show-advance-marking-read-and-archiving)
(define-key map "n" 'notmuch-show-next-message)
(define-key map (kbd "DEL") 'notmuch-show-rewind)
(define-key map " " 'notmuch-show-advance-marking-read-and-archiving)