554 rejected due to spam URL in content
554 rejected due to spam URL in content 退信原因：邮件内容中含有对方认定为垃圾的网址。 解决方案：最 …
退信分析
552 5.1.1 Mailbox delivery failure policy error
退信内容： 552 5.1.1 Mailbox delivery failure policy error 退信原因及解决方案：如果仅仅从上 …
598 maillist rejected
598 maillist rejected 退信原因和分析：598错误，这个在139邮箱可能经常碰到，一般是由于内容等被拒收了，但是上面的这 …
554 5.7.1 Delivery not authorized
554 5.7.1 Delivery not authorized 退信原因：IP黑名单问题 解决方案：可以用其它方式联系对方的网管将你们的 …
554 rcpt is rejected: 218
554 rcpt is rejected: 218 退信原因：收信人被禁用或者地址不存在解决方案：对于这样的退信，一般都是大型厂商的软件的特 …
554 5.6.1 Body type not supported by Remote Host
退信原因：邮件内容编码问题解决方案：Content-Transfer-Encoding有7bit, quoted-printable, ba …
Recipient address rejected:ERS-QIL
退信内容：Recipient address rejected:ERS-QIL退信原因：IP黑名单问题解决方案：这个错误，是趋势网关黑名单I …
suspected spams or account(IP) exception
退信内容：543 suspected spams or account(IP) exception 退信原因：IP问题或者邮件内容问题 解决 …
554 failed MAIL FROM verification with the FROM field in message header
退信内容：554 failed MAIL FROM verification with the FROM field in message …
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550 Mail was identified as spam
550 Mail was identified as spam退信原因：技术性原因解决方案：这个错误的出现，一个是确实的被收信方检测为垃圾邮 …