gnus \e$B$O>o$KEj9F$K$I$NJ}K!$r;H$&$+$r$"$J$?$K?R$M$^$9!#\e(B
\e$B:G8e$K!"$"$J$?$,$$$D$G$b4pK\$NA*BrJ}K!$r;H$C$FEj9F$7$?$$$N$J$i$P!"$3$NJQ\e(B
-\e$B?t$r\e(B @code{nil} \e$B$K$7$F2<$5$$!#\e(B
+\e$B?t$r\e(B @code{native} \e$B$K$7$F2<$5$$!#\e(B
@node Mail and Post
@section \e$B%a!<%k$HEj9F\e(B