Variable: nnmail-incoming-coding-system
nnmail-incoming-coding-system is a variable defined in nnmail.el.gz.
Value
raw-text
Documentation
Coding system used in reading inbox.
Source Code
;; Defined in /usr/src/emacs/lisp/gnus/nnmail.el.gz
(defvar nnmail-incoming-coding-system
mm-text-coding-system
"Coding system used in reading inbox.")