Variable: mail-use-dsn
mail-use-dsn is a customizable variable defined in sendmail.el.gz.
Value
nil
Documentation
Ask MTA for notification of failed, delayed or successful delivery.
Note that only some MTAs (currently only recent versions of Sendmail) support Delivery Status Notification.
This variable was added, or its default value changed, in Emacs 22.1.
Source Code
;; Defined in /usr/src/emacs/lisp/mail/sendmail.el.gz
(defcustom mail-use-dsn nil
"Ask MTA for notification of failed, delayed or successful delivery.
Note that only some MTAs (currently only recent versions of Sendmail)
support Delivery Status Notification."
:type '(repeat (radio (const :tag "Failure" failure)
(const :tag "Delay" delay)
(const :tag "Success" success)))
:version "22.1")