mx.sunuravilo.com has no NS records.
NS records for this zone are defined at sunuravilo.com.
NS records for this zone are defined at sunuravilo.com.
Question and response
Question
dig mx.sunuravilo.com. NS
Answer
The response has no answer records.
Authority
sunuravilo.com. 3600 SOA dns.sunuravilo.com. hostmaster.sunuravilo.com. 1561572496 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0