Variable: mail-source-directory
mail-source-directory is a customizable variable defined in
mail-source.el.gz.
Value
"~/Mail/"
Documentation
Directory where incoming mail source files (if any) will be stored.
Source Code
;; Defined in /usr/src/emacs/lisp/gnus/mail-source.el.gz
(defcustom mail-source-directory message-directory
"Directory where incoming mail source files (if any) will be stored."
:type 'directory)