-** Gnus now supports the "hashcash" client puzzle anti-spam mechanism. See
-the Gnus manual, section Hashcash, for more information. Use `(setq
-message-generate-hashcash t)' to enable.
+** Gnus now supports the "hashcash" client puzzle anti-spam mechanism. Use
+`(setq message-generate-hashcash t)' to enable. *Note Hashcash::.