mx.kopahapa.com has no NS records.
NS records for this zone are defined at kopahapa.com.
NS records for this zone are defined at kopahapa.com.
Question and response
Question
dig mx.kopahapa.com. NS
Answer
The response has no answer records.
Authority
kopahapa.com. 3600 SOA dns.kopahapa.com. hostmaster.kopahapa.com. 1519482213 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0