Host topsec.com.cn(219.141.223.204) MAIL FROM said 451 ... Sender domain must resolve
发布时间：2013-11-27 20:09:01
| 错误代码 | Host topsec.com.cn(219.141.223.204) MAIL FROM said 451 ... Sender domain must resolve. |
| 形成原因 | 发信方的域名无法被收件方反查，导致退信。 |
| 解决办法/流程 | 退信告知邮件投递当时，发信方的域名无法被收件方反查，导致退信。
从451看来这是一个临时错误，我方建议客户稍后重试。 |
本文由163企业邮箱首选网易品牌(http://www.hb-163.com/)原创编辑，转发请注明来源及版权归属。
原文分享地址:http://www.hb-163.com/fault/dns/632.html
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