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 ef32158..4f95d66 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
@@ -20,4 +20,9 @@ https://support.google.com/mail/?p=OverQuotaTemp az1si3814199pjb.65 - gsmtp`
 ## Thư đã bị chặn
 `550 5.7.64 TenantAttribution; Relay Access Denied [PU1APC01FT027.eop-APC01.prod.protection.outlook.com]`
 
-`Net::ReadTimeout`
\ No newline at end of file
+`Net::ReadTimeout`
+
+`552-5.7.0 This message was blocked because its content presents a potential
+552-5.7.0 security issue. Please visit
+552-5.7.0  https://support.google.com/mail/?p=BlockedMessage to review our
+552 5.7.0 message content and attachment content guidelines. w21si1540263pfi.260 - gsmtp` => Gmail nhận định đính kèm có chứa mã độc
\ No newline at end of file