-\e$B$^$?!"9T57$N0-$$$3$H$@$H8@$($^$9$,!"\e(Bencoded-word \e$B$rMQ$$$:$KHs\e(B
-<dref>ASCII</dref> \e$BJ8;z$r\e(B header \e$B$KF~$l$?5-;v$bB8:_$7$^$9!#\e(B
+The encoded-word is the only valid format to represent
+non-<dref>ASCII</dref> characters in a header, but there are also
+invalid styles. Such kinds of evil messages represent
+non-<dref>ASCII</dref> characters in headers without encoded-words (it
+is called "raw" non-<dref>ASCII</dref> characters).