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-rw-r--r--lisp/gnus/nnmail.el4
1 files changed, 3 insertions, 1 deletions
diff --git a/lisp/gnus/nnmail.el b/lisp/gnus/nnmail.el
index 8906a036779..dc2080dee1a 100644
--- a/lisp/gnus/nnmail.el
+++ b/lisp/gnus/nnmail.el
@@ -554,7 +554,9 @@ parameter. It should return nil, `warn' or `delete'."
(const delete)))
(defcustom nnmail-extra-headers '(To Newsgroups)
- "*Extra headers to parse."
+ "Extra headers to parse.
+In addition to the standard headers, these extra headers will be
+included in NOV headers (and the like) when backends parse headers."
:version "21.1"
:group 'nnmail
:type '(repeat symbol))