为什么发邮件出现退信原因：在向对方服务器发送时出现未知错误。

系统退信怎么解觉啊！！有客服帮看看吗？
着急！！！！！




很抱歉，您发送的邮件被退回，以下是该邮件的相关信息：

时　间Mon, 30 Nov 2015 13:34:34 +0800
退信原因 在向对方服务器发送时出现未知错误。
(2)the mta server of mail.ru -- mxs.mail.ru(94.100.180.150) reply:421 Problem resolving DNS for domain uzhardware.com (DNS query timed out) at 2015-11-30 15:35:40
解决方案 联系管理员解决或重新发送。

I'm sorry,you send email to be returnned, the related information for this message:

Date:Mon, 30 Nov 2015 13:34:34 +0800

Reason:Unknown error happened while sending email to other side.
(2)the mta server of mail.ru -- mxs.mail.ru(94.100.180.150) reply:421 Problem resolving DNS for domain uzhardware.com (DNS query timed out) at 2015-11-30 15:35:40
Solution:Contact administrator for help or have a try to send again.