mailservice.crocierissime.it has no NS records.
NS records for this zone are defined at crocierissime.it.
NS records for this zone are defined at crocierissime.it.
Question and response
Question
dig mailservice.crocierissime.it. NS
Answer
The response has no answer records.
Authority
crocierissime.it. 900 SOA ns-787.awsdns-34.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0