@item Message \e$B%b!<%I$NJQ99\e(B
@itemize @bullet
+@item \e$B$9$Y$F$NAw?.:Q$_%a%C%;!<%8$N%G%#%U%)%k%H$NJ]B8@h$,!"7n$4$H\e(B
+\e$B$N\e(B nnfolder \e$B%"!<%+%$%V$K$J$j$^$7$?!#\e(B
+
@item Gnus \e$B$O!H\e(Bhashcash\e$B!I\e(Bclient puzzle anti-spam \e$B$N5!9=$r%5%]!<%H$7$^$9!#\e(B
@code{(setq message-generate-hashcash t)} \e$B$GM-8z$K$J$j$^$9!#\e(B
@xref{Hashcash}.