mx.zunelavora.com has no NS records.
NS records for this zone are defined at zunelavora.com.
NS records for this zone are defined at zunelavora.com.
Question and response
Question
dig mx.zunelavora.com. NS
Answer
The response has no answer records.
Authority
zunelavora.com. 3600 SOA dns.zunelavora.com. hostmaster.zunelavora.com. 1139135688 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0