diff --git a/Log-Bounce.md b/Log-Bounce.md
index 126600d..1fee7b3 100644
--- a/Log-Bounce.md
+++ b/Log-Bounce.md
@@ -15,7 +15,7 @@ The email address you entered couldn't be found. Please check the recipient's em
 ```
 => Đã gửi được mail, không gửi được tới 1 trong số những người dùng trong alias
 
-
+### Domain not found
 * Subject: Undelivered Mail Returned to Sender
 
 url: https://postman.prmail.vn/org/prmail/servers/dauthau/messages/16118