diff -ruN courier-0.42.2.orig/debian/rules courier-0.42.2/debian/rules
--- courier-0.42.2.orig/debian/rules    2003-09-09 03:28:13.000000000 +0900
+++ courier-0.42.2/debian/rules 2003-09-09 03:31:00.000000000 +0900
@@ -69,4 +69,5 @@
                --enable-userdb \
                --enable-syslog=1 \
                --enable-unicode \
+               --enable-unicode=iso-2022-jp,utf-8,iso-8859-1 \
                --disable-root-check

 check: