Variable: mail-source-string
mail-source-string is a variable defined in mail-source.el.gz.
Value
""
Documentation
A dynamically bound string that says what the current mail source is.
Source Code
;; Defined in /usr/src/emacs/lisp/gnus/mail-source.el.gz
;;; Internal variables.
(defvar mail-source-string ""
"A dynamically bound string that says what the current mail source is.")