Comment 3 for bug 912531

The following bindings work pretty well for me:

; Bindings for navigating HTML mails rendered through emacs-w3m
(define-key vm-mode-map (kbd "C-c C-o") 'w3m-view-url-with-external-browser)
(define-key vm-mode-map (kbd "C-c C-v") 'w3m-view-this-url)
(define-key vm-mode-map (kbd "<down-mouse-1>") 'w3m-mouse-view-this-url)
(define-key vm-mode-map (kbd "C-c C-p") 'w3m-previous-anchor)
(define-key vm-mode-map (kbd "C-c C-n") 'w3m-next-anchor)
(define-key vm-mode-map (kbd "C-c C-w") 'w3m-print-this-url)
(define-key vm-mode-map (kbd "C-c C-[") 'w3m-previous-image)
(define-key vm-mode-map (kbd "C-c C-]") 'w3m-next-image)
(define-key vm-mode-map (kbd "C-c C-i") 'w3m-toggle-inline-image)
(define-key vm-mode-map (kbd "C-c i") 'w3m-toggle-inline-images)