smtp.ip.pt has no NS records.
NS records for this zone are defined at ip.pt.
NS records for this zone are defined at ip.pt.
Question and response
Question
dig smtpin1.smail.eu. NS
Answer
The response has no answer records.
Authority
smail.eu. 900 SOA ns1.dnspro.pt. support.sooma.com. 2025121501 1200 180 1209600 900
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0