mx.fairwindgrove.com has no NS records.
NS records for this zone are defined at fairwindgrove.com.
NS records for this zone are defined at fairwindgrove.com.
Question and response
Question
dig mx.fairwindgrove.com. NS
Answer
The response has no answer records.
Authority
fairwindgrove.com. 3600 SOA dns.fairwindgrove.com. hostmaster.fairwindgrove.com. 1942881671 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0