mx.protec.it has no NS records.
NS records for this zone are defined at protec.it.
NS records for this zone are defined at protec.it.
Question and response
Question
dig mx.protec.it. NS
Answer
The response has no answer records.
Authority
protec.it. 600 SOA ns1.protec.it. hostmaster.protec.it. 2026031001 86400 7200 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0