mx.pec-email.com has no NS records.
NS records for this zone are defined at pec-email.com.
NS records for this zone are defined at pec-email.com.
Question and response
Question
dig mx.pec-email.com. NS
Answer
The response has no answer records.
Authority
pec-email.com. 900 SOA ns1.register.it. hostmaster.register.it. 2025100902 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0