(define-key map (kbd "TAB") 'notmuch-show-next-button)
(define-key map "f" 'notmuch-show-forward-message)
(define-key map "F" 'notmuch-show-forward-open-messages)
(define-key map (kbd "TAB") 'notmuch-show-next-button)
(define-key map "f" 'notmuch-show-forward-message)
(define-key map "F" 'notmuch-show-forward-open-messages)