Variable: display-time-mail-file
display-time-mail-file is a customizable variable defined in
time.el.gz.
Value
nil
Documentation
File name of mail inbox file, for indicating existence of new mail.
Non-nil and not a string means don't check for mail; nil means use default, which is system-dependent, and is the same as used by Rmail.
Source Code
;; Defined in /usr/src/emacs/lisp/time.el.gz
(defcustom display-time-mail-file nil
"File name of mail inbox file, for indicating existence of new mail.
Non-nil and not a string means don't check for mail; nil means use
default, which is system-dependent, and is the same as used by Rmail."
:type '(choice (const :tag "None" none)
(const :tag "Default" nil)
(file :format "%v")))