posta.inasset.it has no CNAME records.
Question and response
Question
dig posta.inasset.it. NS
Answer
The response has no answer records.
Authority
inasset.it. 5892 SOA dns1.inasset.net. domains.inasset.it. 2026012501 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0