Sending a Message
-----------------

   If you want to check your spelling in your message before sending,
use `mh-before-send-letter-hook' like this:

   Spell-check message via mh-before-send-letter-hook

     (add-hook 'mh-before-send-letter-hook 'ispell-message)

   In case the MH `send' program is installed under a different name,
use `mh-send-prog' to tell mh-e the name.