--- /usr/src/usr.sbin/adduser/rmuser.sh	2011-11-11 13:20:22.000000000 +0900
+++ rmuser	2012-08-02 11:14:38.000000000 +0900
@@ -91,6 +91,12 @@
 		verbose && echo -n " ${MAILSPOOL}/.${login}.pop" ||
 		    echo -n " pop3"
 		rm ${MAILSPOOL}/.${login}.pop
+		if [ -f ${MAILSPOOL}/.${login}.cache ]; then
+			verbose && echo '.'
+			verbose && echo -n " ${MAILSPOOL}/.${login}.cache" ||
+			    echo -n " pop3"
+			rm ${MAILSPOOL}/.${login}.cache
+		fi
 	fi
 	verbose && echo '.'
 }