- NSLOOKUP (DOS command)
- IP Tools (Online utility)
Non-authoritative answer:The results show that google.com has 4 MX records, all set to preference 10 (kind of like a round robin approach), and then it list the IP's for each MX hostname.
google.com MX preference = 10, mail exchanger = smtp2.google.com
google.com MX preference = 10, mail exchanger = smtp3.google.com
google.com MX preference = 10, mail exchanger = smtp4.google.com
google.com MX preference = 10, mail exchanger = smtp1.google.com
smtp2.google.com internet address = 64.233.165.25
smtp3.google.com internet address = 64.233.183.25
smtp4.google.com internet address = 72.14.221.25
smtp1.google.com internet address = 209.85.237.25
>
Another way to use nslookup is to change the DNS server it uses to see if other DNS servers report different results than your default DNS server configured on your Ethernet adapter (TCP/IP settings). After entering the nslookup prompt type 'server new_dns_server_IP', where new_dns_server_IP is the DNS server IP or hostname you want to use to check records against, it could be a secondary DNS server on your local network or your ISP's DNS server. Then perform the lookup on your domain to see what that DNS server reports.
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