mail.enginfo.it has no NS records.
NS records for this zone are defined at enginfo.it.
NS records for this zone are defined at enginfo.it.
Question and response
Question
dig mail.enginfo.it. NS
Answer
The response has no answer records.
Authority
enginfo.it. 1800 SOA mira.ns.cloudflare.com. dns.cloudflare.com. 2396108760 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0