M%E1%BB%99t-s%E1%BB%91-log-l%E1%BB%97i-c%E1%BA%A7n-quan-t%C3%A2m.md

@@ -1,25 +1,39 @@
 ## Thư bị chặn
 
-`550-5.7.1 LIEBHERR spam recognition! Please add U-mgdA2BMa4iL in subject AND body and re-send your email after 15 minutes. 
+```
+550-5.7.1 LIEBHERR spam recognition! Please add U-mgdA2BMa4iL in subject AND body and re-send your email after 15 minutes. 
 550-5.7.1 CYREN IP reputation determined a medium risk associated with the sender address 171.244.9.134. 
-550 5.7.1 MAIL FROM domain (return.prmailmx.com) and Header-From domain (ckda.vn) are not equal.`
+550 5.7.1 MAIL FROM domain (return.prmailmx.com) and Header-From domain (ckda.vn) are not equal.
-
+```
 - Lý do: Mail gửi từ domain ckda.vn có header-from (return.prmailmx.com) không trùng tên domain.
 - Gửi lại thư: add U-mgdA2BMa4iL vào subject,body và gửi lại thư sau 15p
 - Khắc phục: Xác thực các bản ghi của domain trên postman.
 
 ## Server nhận yêu cầu có bản ghi MX
-`451 <pmrp.dau-thau.com> does not have an MX record`
+```
+451 <pmrp.dau-thau.com> does not have an MX record
+```
 
 ## Server postman thiếu ip reverse DNS
-`550-5.5.1 Your server IP address [171.244.9.123] is missing a reverse DNS 550-entry. See http://spamauditor.org/best-practices/check-ip-reverse-dns/ for 550-more information.. Protection provided by MagicSpam 2.1-12.1 550 http://www.magicspam.com`
+```
+550-5.5.1 Your server IP address [171.244.9.123] is missing a reverse DNS 550-entry. See http://spamauditor.org/best-practices/check-ip-reverse-dns/ for 550-more information.. Protection provided by MagicSpam 2.1-12.1 550 http://www.magicspam.com
+```
 
 ## IP đã bị block
-`421 Your IP is blocked for a long time did not access.` => Server nhận block
+```
+421 Your IP is blocked for a long time did not access.
+```
+=> Server nhận block
 
-`550 Service unavailable; Client Host [171.244.9.123] blocked using Trend Micro RBL+. Please see http://www.mail-abuse.com/cgi-bin/lookup?ip_address=171.244.9.123` => IP gửi mail đã bị TrendMicro block
+```
+550 Service unavailable; Client Host [171.244.9.123] blocked using Trend Micro RBL+. Please see http://www.mail-abuse.com/cgi-bin/lookup?ip_address=171.244.9.123
+```
+=> IP gửi mail đã bị TrendMicro block
 
-`550 5.7.1 Unfortunately, messages from [180.188.197.157] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3150). You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. [CO1NAM11FT019.eop-nam11.prod.protection.outlook.com]` => IP đã bị block. Requesst IP Block tại: https://support.microsoft.com/en-us/supportrequestform/
+```
+550 5.7.1 Unfortunately, messages from [180.188.197.157] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3150). You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. [CO1NAM11FT019.eop-nam11.prod.protection.outlook.com]
+```
+=> IP đã bị block. Requesst IP Block tại: https://support.microsoft.com/en-us/supportrequestform/
 
 
 ## Lỗi không xác định
@@ -28,4 +42,6 @@
 
 ```
 ## Bug
-`Invalid argument - connect(2) for "alt1.aspmx.l.google.com" port 25, Invalid argument - connect(2) for "aspmx.l.google.com" port 25, Invalid argument - connect(2) for "alt2.aspmx.l.google.com" port 25, Invalid argument - connect(2) for "aspmx2.googlemail.com" port 25, Invalid argument - connect(2) for "aspmx3.googlemail.com" port 25, Invalid argument - connect(2) for "aspmx4.googlemail.com" port 25, Invalid argument - connect(2) for "aspmx5.googlemail.com" port 25`
+```
+Invalid argument - connect(2) for "alt1.aspmx.l.google.com" port 25, Invalid argument - connect(2) for "aspmx.l.google.com" port 25, Invalid argument - connect(2) for "alt2.aspmx.l.google.com" port 25, Invalid argument - connect(2) for "aspmx2.googlemail.com" port 25, Invalid argument - connect(2) for "aspmx3.googlemail.com" port 25, Invalid argument - connect(2) for "aspmx4.googlemail.com" port 25, Invalid argument - connect(2) for "aspmx5.googlemail.com" port 25
+```