RMAIL summary and C-x C-s

[Alfred M. Szmidt]

This is really just a wish list item, often when I view the summary in
RMAIL, I find myself wanting to save the buffer without changing
windows.  This makes it so you can save the associated buffer by just
hitting C-x C-s.

(defun rmail-summary-save-buffer ()
  "Save the buffer associated with this RMAIL summary."
  (interactive)
  (save-window-excursion
    (save-excursion
      (switch-to-buffer rmail-buffer)
      (save-buffer))))

(define-key rmail-summary-mode-map "\C-x\C-s" 'rmail-summary-save-buffer)