mx.antispam.i2.dk has no NS records.
NS records for this zone are defined at i2.dk.
NS records for this zone are defined at i2.dk.
Question and response
Question
dig mx.antispam.i2.dk. NS
Answer
The response has no answer records.
Authority
i2.dk. 3600 SOA mimer.deic.dk. dns.darenet.dk. 1771794018 16384 2048 2097152 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0