prosmtp.mail.libello.com has no NS records.
NS records for this zone are defined at mail.libello.com.
NS records for this zone are defined at mail.libello.com.
Question and response
Question
dig prosmtp.mail.libello.com. NS
Answer
The response has no answer records.
Authority
libello.com. 172800 SOA ns1.monaco-telecom.mc. psih.monaco-telecom.mc. 2025123001 28800 7200 2419200 172800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0