Variable: message-kill-buffer-on-exit
message-kill-buffer-on-exit is a customizable variable defined in
message.el.gz.
Value
nil
Documentation
Non-nil means that the message buffer will be killed after sending a message.
Source Code
;; Defined in /usr/src/emacs/lisp/gnus/message.el.gz
(defcustom message-kill-buffer-on-exit nil
"Non-nil means that the message buffer will be killed after sending a message."
:group 'message-buffers
:link '(custom-manual "(message)Message Buffers")
:type 'boolean)