mail.orionprato.com has no NS records.
NS records for this zone are defined at orionprato.com.
NS records for this zone are defined at orionprato.com.
Question and response
Question
dig mx.orionprato.com. NS
Answer
The response has no answer records.
Authority
orionprato.com. 900 SOA ns1.register.it. hostmaster.register.it. 2024061303 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0