diff --git a/src/main/resources/egovframework/sqlmap/let/letter/LetterMessages_SQL_Mysql.xml b/src/main/resources/egovframework/sqlmap/let/letter/LetterMessages_SQL_Mysql.xml
index 69504499..cfb21d50 100644
--- a/src/main/resources/egovframework/sqlmap/let/letter/LetterMessages_SQL_Mysql.xml
+++ b/src/main/resources/egovframework/sqlmap/let/letter/LetterMessages_SQL_Mysql.xml
@@ -712,6 +712,7 @@
 			, UPDATEDATE = NOW()
 		WHERE 1=1
 			AND USE_YN = 'Y' 
+			AND BEST_CATEGORY IS NULL
 			AND LETTER_TYPE IN ('S', 'L', 'P')
 			AND priority >= 11
 	]]>