mx.suttonreality.com has no NS records.
NS records for this zone are defined at suttonreality.com.
NS records for this zone are defined at suttonreality.com.
Question and response
Question
dig mx.suttonreality.com. NS
Answer
The response has no answer records.
Authority
suttonreality.com. 3600 SOA dns.suttonreality.com. hostmaster.suttonreality.com. 1172482247 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0