Variable: gnus-registry-track-extra
gnus-registry-track-extra is a customizable variable defined in
gnus-registry.el.gz.
Value
(subject sender recipient)
Documentation
Whether the registry should track extra data about a message.
The subject, recipients (To: and Cc:), and Sender (From:) headers are tracked this way by default.
Source Code
;; Defined in /usr/src/emacs/lisp/gnus/gnus-registry.el.gz
(defcustom gnus-registry-track-extra '(subject sender recipient)
"Whether the registry should track extra data about a message.
The subject, recipients (To: and Cc:), and Sender (From:) headers
are tracked this way by default."
:type
'(set :tag "Tracking choices"
(const :tag "Track by subject (Subject: header)" subject)
(const :tag "Track by recipient (To: and Cc: headers)" recipient)
(const :tag "Track by sender (From: header)" sender)))