比如你想查域名：315safe.com的MX记录
在开始-运行输入：
nslookup
接着会出现：
Default Server: ns.wuhan.net.cn
Address: 202.103.24.68

然后在提示符下依次输入如下两条命令：
> set q=mx
> 315safe.com
就会出现：
Server: ns.wuhan.net.cn
Address: 202.103.24.68

DNS request timed out.
timeout was 2 seconds.
Non-authoritative answer:
315safe.com MX preference = 0, mail exchanger = 58.53.128.49.315safe.com

58.53.128.49.315safe.com internet address = 58.53.128.50


在上面的结果中：
315safe.com MX preference = 0, mail exchanger =58.53.128.49.315safe.com
就是你要查的MX记录