Variable: message-generate-hashcash
message-generate-hashcash is a customizable variable defined in
message.el.gz.
Value
nil
Documentation
Whether to generate X-Hashcash: headers.
If t, always generate hashcash headers. If opportunistic,
only generate hashcash headers if it can be done without the user
waiting (i.e., only asynchronously). If nil, don't generate
hashcash headers.
You must have the "hashcash" binary installed, see hashcash-program.
This variable was added, or its default value changed, in Emacs 24.1.
Source Code
;; Defined in /usr/src/emacs/lisp/gnus/message.el.gz
(defcustom message-generate-hashcash (if (executable-find "hashcash") 'opportunistic)
"Whether to generate X-Hashcash: headers.
If t, always generate hashcash headers. If `opportunistic',
only generate hashcash headers if it can be done without the user
waiting (i.e., only asynchronously). If nil, don't generate
hashcash headers.
You must have the \"hashcash\" binary installed, see `hashcash-program'."
:version "24.1"
:group 'message-headers
:link '(custom-manual "(message)Mail Headers")
:type '(choice (const :tag "Always" t)
(const :tag "Never" nil)
(const :tag "Opportunistic" opportunistic)))