Variable: gnus-article-unpropagated-mark-lists
gnus-article-unpropagated-mark-lists is a variable defined in
gnus.el.gz.
Value
(seen cache download unsend score bookmark unexist)
Documentation
Marks that shouldn't be propagated to back ends.
Typical marks are those that make no sense in a standalone back end,
such as a mark that says whether an article is stored in the cache
(which doesn't make sense in a standalone back end).
Source Code
;; Defined in /usr/src/emacs/lisp/gnus/gnus.el.gz
;; Propagate flags to server, with the following exceptions:
;; `seen' is private to each gnus installation
;; `cache' is an internal gnus flag for each gnus installation
;; `download' is an agent flag private to each gnus installation
;; `unsend' are for nndraft groups only
;; `score' is not a proper mark
;; `bookmark': don't propagate it, or fix the bug in update-mark.
(defconst gnus-article-unpropagated-mark-lists
'(seen cache download unsend score bookmark unexist)
"Marks that shouldn't be propagated to back ends.
Typical marks are those that make no sense in a standalone back end,
such as a mark that says whether an article is stored in the cache
\(which doesn't make sense in a standalone back end).")