email - 如何检查MX域名

siwei@siwei-i5:/workspace$ nslookup
> ns39.domaincontrol.com
Server:		127.0.1.1
Address:	127.0.1.1#53

Non-authoritative answer:
Name:	ns39.domaincontrol.com
Address: 97.74.109.20
> set q=M
unknown query type: M
> set q=MX
> wzjhn.io
Server:		127.0.1.1
Address:	127.0.1.1#53

Non-authoritative answer:
wzjhn.io	mail exchanger = 10 mx.ym.163.com.

Authoritative answers can be found from: