mx.jvelyn.com has no NS records.
NS records for this zone are defined at jvelyn.com.
NS records for this zone are defined at jvelyn.com.
Question and response
Question
dig mx.jvelyn.com. NS
Answer
The response has no answer records.
Authority
jvelyn.com. 3600 SOA dns.jvelyn.com. hostmaster.jvelyn.com. 1179279396 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0