+
+@item message-generate-hashcash
+@vindex message-generate-hashcash
+\e$B%a%C%;!<%8$K\e(B @samp{X-Hashcash} \e$B%X%C%@!<$rIU2C$9$Y$-$+$I$&$+$r;X<($9$k%V!<\e(B
+\e$B%k\e(B (\e$BCM$,\e(B @code{nil} \e$B$+Hs\e(B-@code{nil} \e$B$N\e(B) \e$BJQ?t$G$9!#\e(B@xref{Hashcash,
+,Hashcash,gnus-ja,The Gnus Manual}.