Host abc01.com(xxx.xxx.xxx.xxx) OPEN said 421 abc02.com has refused your connection as your mail server appears to be blacklisted.
发布时间：2013-12-31 14:58:29
| 错误代码 | Host abc01.com(xxx.xxx.xxx.xxx) OPEN said 421 abc02.com has refused your connection as your mail server appears to be blacklisted. |
| 形成原因 | 主机abc01.com(xxx xxx xxx xxx)公开表示421 临时错误：abc02.com拒绝你的连接,你的邮件服务器似乎被列入黑名单。 |
| 解决办法/流程 |
建议：
1 421是临时错误，对方针对我发信服务器方的连接频率有限制，建议您稍后重试。
2 同时，我们已经联系了我方技术人员协助改走发信频率较低的发信通道，尝试为您改善目前的发信情况。
|
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