谁帮我看看退信什么意思

hcyy

Mail Delivery System"<MAILER-DAEMON@sohu.com> <br>
This is the Postfix program at host websmtp216.sohu.com.<br>
<br>
I'm sorry to have to inform you that the message returned<br>
below could not be delivered to one or more destinations.<br>
<br>
For further assistance, please send mail to <postmaster><br>
<br>
If you do so, please include this problem report. You can<br>
delete your own text from the message returned below.<br>
<br>
The Postfix program<br>
<br>
<hcyy@fdc123.com>: connect to dns2.hichina.com[202.106.169.100]: Connection<br>refused<br>

电脑报

connect to dns2.hichina.com[202.106.169.100]: Connection refused<br>
这样的系统退信还是头一次看到<br>
DNS服务器会“拒绝连接”<br>
如果你使用了202.106.169.100作为DNS服务器的话，建更改成为<br>dns7.hichina.com或 dns8.hichina.com，或者其他的可用的DNS服务器地址（邮件系统及网卡的DNS地址）<br>
有问题再发贴，大家讨论<br>
<br>