不能發出電郵,提示can't resolve domain name

huchenghui

failure notice
Hi. This is the deliver program at smtp.zmail.net.cn.
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.

test@test.com
can't resolve domain name
--- Attachment is a copy of the message.

[这是服务器 smtp.zmail.net.cn 的投递程序返回的提示信息]

到下列地址的信件投递失败，对方服务器无法正常接受或者拒绝接受这封邮件，
这是一个永久性的错误，服务器已经放弃继续投递。
test@test.com

对方服务器返回错误提示:
can't resolve domain name
--
[附件是您所发送信件的原件]

neil.fu

对方服务器拒绝