diff --git a/M%E1%BB%99t-s%E1%BB%91-log-l%E1%BB%97i-th%C6%B0%E1%BB%9Dng-g%E1%BA%B7p.md b/M%E1%BB%99t-s%E1%BB%91-log-l%E1%BB%97i-th%C6%B0%E1%BB%9Dng-g%E1%BA%B7p.md
index 1bc5bab..888ae08 100644
--- a/M%E1%BB%99t-s%E1%BB%91-log-l%E1%BB%97i-th%C6%B0%E1%BB%9Dng-g%E1%BA%B7p.md
+++ b/M%E1%BB%99t-s%E1%BB%91-log-l%E1%BB%97i-th%C6%B0%E1%BB%9Dng-g%E1%BA%B7p.md
@@ -38,3 +38,7 @@ https://support.google.com/mail/?p=OverQuotaTemp az1si3814199pjb.65 - gsmtp`
 
 `451 4.7.0 Temporary server error. Please try again later. PRX2`
 
+`Connection refused - connect(2) for "mail90109.maychuemail.com" port 25` => Server nhận không mở port 25
+
+
+