smtp-srv2.isti.cnr.it has no NS records.
NS records for this zone are defined at isti.cnr.it.
NS records for this zone are defined at isti.cnr.it.
Question and response
Question
dig smtp-srv2.isti.cnr.it. NS
Answer
The response has no answer records.
Authority
isti.cnr.it. 3600 SOA ns1.isti.cnr.it. hostmaster.isti.cnr.it. 2026032301 86400 1800 604800 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0