   (setq mu4e-headers-include-related t)
   ;; exclude the duplicate messages with the same `Message-ID'
   ;(setq mu4e-headers-skip-duplicates t)
-
-  ;; compose messages in a separate frame
-  (setq mu4e-compose-in-new-frame t)
 
   ;; customize the reply/quote citation format
   (setq message-citation-line-format "On %a, %b %d, %Y at %R, %f wrote:\n")

  (setq mu4e-change-filenames-when-moving t)

  ;; kill the buffer after sending a message
  ;(setq message-kill-buffer-on-exit t)

  ;; exclude myself when replying to all
  (setq mu4e-compose-dont-reply-to-self t)

  ;; enable inline images
  (setq mu4e-view-show-images t)

  ;; start with the first (default) context
  ;; default: `ask-if-none' (ask when there's no context yet, and none match)
  (setq mu4e-context-policy 'pick-first)
  ;; compose with the current context if no context matches (default: `ask')
  (setq mu4e-compose-context-policy nil)

  ;; auto construct addresses list by extracting addresses from contexts
  (setq mu4e-user-mail-address-list
