mx4.spamfri.dk has no NS records.
NS records for this zone are defined at spamfri.dk.
NS records for this zone are defined at spamfri.dk.
Question and response
Question
dig mx4.spamfri.dk. NS
Answer
The response has no answer records.
Authority
spamfri.dk. 7200 SOA ns1.dns.services. post.dns.services. 2022051769 10800 3600 1814400 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0