mx.mavoliro.com has no NS records.
NS records for this zone are defined at mavoliro.com.
NS records for this zone are defined at mavoliro.com.
Question and response
Question
dig mx.mavoliro.com. NS
Answer
The response has no answer records.
Authority
mavoliro.com. 3600 SOA dns.mavoliro.com. hostmaster.mavoliro.com. 1837421802 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0