mx.yieldlisting.com has no NS records.
NS records for this zone are defined at yieldlisting.com.
NS records for this zone are defined at yieldlisting.com.
Question and response
Question
dig mx.yieldlisting.com. NS
Answer
The response has no answer records.
Authority
yieldlisting.com. 3600 SOA dns.yieldlisting.com. hostmaster.yieldlisting.com. 1573996188 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0