(setq mew-spam: "X-Spam-Flag:")

; put "D"
(defun mew-spam-bsfilter (val)
  (let ((case-fold-search t))
	(if (string-match "yes" val) ?D)))

; put "o +spam" at inc
;(defun mew-spam-bsfilter (val)
;  (let ((case-fold-search t))
;    (if (string-match "yes" val) "+spam")))

(setq mew-inbox-action-alist
	  '(("X-Spam-Flag:" mew-spam-bsfilter)))

; for "ls" (learn-spam)
(setq mew-spam-prog "bsfilter")
(setq mew-spam-prog-args '("-C" "-s" "-u"))

; for "lh" (learn-ham)
(setq mew-ham-prog "bsfilter")
(setq mew-ham-prog-args '("-c" "-S" "-u"))

; for "bm" (mark-spam)
(define-key mew-summary-mode-map "bm" 'mew-summary-bsfilter-mark-region)

(defun mew-summary-bsfilter-mark-region (&optional arg)
  "study/judge the region and put the '*' mark onto spams.
need to re-learn if judgment of bsfilter is wrong"
  (interactive "P")
  (mew-pickable
   (let ((func 'mew-summary-pick-with-cmd)
	 (mew-inherit-grep-cmd "bsfilter -a --list-spam"))
	 (mew-summary-pick-body func t nil 'nopattern))))

; show X-Spam-Flag and X-Spam-Probability in message buffer
(setq mew-field-spec
	  (reverse (append (list (car (reverse mew-field-spec)))
			   '(("^X-Spam-Probability:$" t)
			 ("^X-Spam-Flag:$" t))
			   (cdr (reverse mew-field-spec)))))