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退信分析
550 Mail was identified as spam[2022-3-24]
554 failed MAIL FROM verification with the FROM field in message header[2022-3-22]
suspected spams or account(IP) exception[2021-6-2]
Recipient address rejected:ERS-QIL[2021-1-11]
554 5.6.1 Body type not supported by Remote Host[2020-5-11]
554 rcpt is rejected: 218[2020-1-7]
554 5.7.1 Delivery not authorized[2018-12-17]
598 maillist rejected[2018-1-22]
139邮箱常见退信说明[2017-11-17]
552 5.1.1 Mailbox delivery failure policy error[2017-11-3]
554 rejected due to spam URL in content[2017-6-1]
Requested mail action not taken: Invalid IP[2017-5-26]
553 sorry, you must authentication[2017-5-26]
550 5.7.0 Local Policy Violation. check SPF[2017-5-26]
550 ACL:RE Hit acl, permission deny[2017-5-26]
550 Denied by policy[2017-5-26]
554 5.7.1 This message has been blocked because ASE reports it as spam[2017-5-26]
554 Content filter will not allow this message[2017-5-26]
550 Backend Replied [xxx.mxlogic.net]:Denied by policy (Mode: normal)[2017-4-23]
550 Mail is rejected by recipients[2017-4-6]
421 4.4.5 Service not available, too many connections, code=CL82[2017-4-6]
Could not connect to 0.0.0.0 on port 25 since this would mean connecting to myself[2017-4-6]
550 5.7.1 message content rejected[2017-4-6]
451 Failed to store message for[2017-4-6]
554 5.7.1 Client host rejected: Access denied[2017-3-20]
552 Sorry, your host is blocked by spam detection system[2017-3-7]
554 mail server permanently rejected message (#5.3.0)[2017-2-20]
550 Relaying mail to 81170011@cptt.com.tw is not allowed[2017-2-20]
550 Sender has no A, AAAA, or MX DNS records[2017-2-18]
500 Line too long[2017-2-18]
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