mx.merinate.com has no NS records.
NS records for this zone are defined at merinate.com.
NS records for this zone are defined at merinate.com.
Question and response
Question
dig mx.merinate.com. NS
Answer
The response has no answer records.
Authority
merinate.com. 3600 SOA dns.merinate.com. hostmaster.merinate.com. 1707928959 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0