mx01.sparkmail.it has no NS records.
NS records for this zone are defined at sparkmail.it.
NS records for this zone are defined at sparkmail.it.
Question and response
Question
dig mx01.sparkmail.it. NS
Answer
The response has no answer records.
Authority
sparkmail.it. 1800 SOA edward.ns.cloudflare.com. dns.cloudflare.com. 2393074953 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0