mx.yantrolvexio.com has no NS records.
NS records for this zone are defined at yantrolvexio.com.
NS records for this zone are defined at yantrolvexio.com.
Question and response
Question
dig mx.yantrolvexio.com. NS
Answer
The response has no answer records.
Authority
yantrolvexio.com. 3600 SOA dns.yantrolvexio.com. hostmaster.yantrolvexio.com. 1832581511 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0