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Phuong Nguyen 2020-02-17 15:23:56 +07:00
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M%E1%BB%99t-s%E1%BB%91-log-l%E1%BB%97i-c%E1%BA%A7n-quan-t%C3%A2m.md

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## 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`