How to use Nslookup to verify MX record configuration

1. At a command prompt, type nslookup, and then press ENTER.
2. Type server <IP address>, where IP address is the IP address of your external DNS server, and then press ENTER.
3. Type set q=MX, and then press ENTER.
4. Type <domain name>, where domain name is the name of your domain, and then press ENTER. The MX record for the domain you entered should be displayed. If the MX record is not displayed, DNS is not configured properly.

Example

C:\> nslookup

Default Server: pdc.corp.example.com
Address: 192.168.6.13

>server 172.31.01.01

Default Server: dns1.example.com
Address: 172.31.01.01

>set q=mx

>example.com.(note: with the dot at the end)

Output

Server: dns1.example.com
Address: 10.107.1.7
example.com MX preference = 10, mail exchanger = mail1.example.com
example.com MX preference = 10, mail exchanger = mail2.example.com
example.com MX preference = 10, mail exchanger = mail3.example.com
example.com MX preference = 10, mail exchanger = mail4.example.com
example.com MX preference = 10, mail exchanger = mail5.example.com
mail1.example.com internet address = 172.31.31.01
mail2.example.com internet address = 172.31.31.02
mail3.example.com internet address = 172.31.31.03
mail4.example.com internet address = 172.31.31.04
mail5.example.com internet address = 172.31.31.05