Variable: message-send-rename-function
message-send-rename-function is a customizable variable defined in
message.el.gz.
Value
message-default-send-rename-function
Documentation
Function called to rename the buffer after sending it.
This variable was added, or its default value changed, in Emacs 28.1.
Source Code
;; Defined in /usr/src/emacs/lisp/gnus/message.el.gz
(defcustom message-send-rename-function #'message-default-send-rename-function
"Function called to rename the buffer after sending it."
:group 'message-buffers
:version "28.1"
:type 'function)