@vindex message-use-idna
\e$BJQ?t\e(B @code{message-use-idna} \e$B$O\e(B @acronym{IDNA} \e$B$r;H$&$+$I$&$+$r@)8f$7$^\e(B
\e$B$9!#$3$NJQ?t$,\e(B @code{nil} \e$B$@$C$?$i\e(B @acronym{IDNA} \e$B%(%s%3!<%I$O9T$J$o$l$^\e(B
-\e$B$;$s!#%7%s%\%k\e(B @code{ask} \e$B$K@_Dj$5$l$F$$$k\e(B (\e$B%G%#%U%)%k%H\e(B) \e$B$H%f!<%6$O3NG'\e(B
-\e$B$r5a$a$i$l$^$9!#$=$7$F\e(B @code{t} \e$B$K@_Dj$5$l$F$$$k$H!"<+F0E*\e(B
+\e$B$;$s!#%7%s%\%k\e(B @code{ask} \e$B$K@_Dj$5$l$F$$$k$H%f!<%6$O3NG'$r5a$a$i$l$^$9$,!"\e(B
+@code{t} \e$B$K@_Dj$5$l$F$$$k\e(B (\e$B$=$l$,%G%#%U%)%k%H$G$9\e(B) \e$B$H!"<+F0E*\e(B
\e$B$K\e(B @acronym{IDNA} \e$B%(%s%3!<%I$,9T$J$o$l$^$9!#\e(B
@findex message-idna-to-ascii-rhs