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- 退信提示:543 suspected spams or account(IP) exception
- 退信提示:554 failed MAIL FROM verification with the FROM field in message header
- 退信提示:550 Mail was identified as spam
- 退信提示:554 Your access to this mail system has been rejected due to the sending MTAs poor reputation
- 企业邮箱发送邮件未成功投递,收到退信怎么办?
- 退信提示:“550 abc@domain:mailbox limit exceeded (inreply to end of DATA command)”
- 退信提示报错 “DNS query error:163.com”
- 退信提示:“SMTP error, RCPT TO:550 rc:bl access denied”
- 退信提示:“SMTP error, MAIL FROM:553 sorry, your envelope sender domain must exist”
- 退信提示:“550 5.7.1 Recipient not authorized, your IP has been found on a block list”
- 退信提示:“MAIL FROM: 550 5.0.0 Mail rejected due to possible SPAM”
- 退信提示:“delivery temporarily suspended:connect to mail.abc.com[xxx.xxx.xx.xx]:Connection timed out”
- 退信提示报错“domain abc.com MX query return retry”
- 退信提示:“501: domain missing or malformed”
- 退信提示:“550 Sender domain must exist ”
- 退信提示:“Host abc.com(xx.xx.xx.xx) MAIL FROM said 451
- 退信提示:“Host abc.com(xx.xx.xx.xx) RCPT TO said 421 Refused. You have no reverse DNS entry. Contact ab@163.com for details”
- 退信提示:“No MX or A records for 163.com”
- 退信提示:“SMTP error, DOT: 554 5.7.1 This message has been blocked because the return email domain is invalid.(failed to obtain DNS record for domain 163.com)”
- 退信提示:“SMTP error, MAIL FROM:553 SPF check refused(softfail)”
- 退信提示:“SMTP error, RCPT TO: 550 [PERMFAIL] abc.com requires valid sender domain”
- 退信提示:“SMTP error, RCPT TO:550 No such domain at this location”
- 退信提示:“SMTP error, RCPT TO:553 5.7.1 sorry, that domain isn't in my list of allowed rcpthosts (chkuser)”
- 退信提示:“SMTP error,DOT:550 abc.com has no A,AAAA,,or MX DNS records…”
- 退信提示:“UnKnown can't find abc.com: Non-existent domain”
- 邮件被收件方拒收,收件方返回退信说明 “550 Mailbox not found”