mx.mail.postal.copyleft.no has no NS records.
NS records for this zone are defined at copyleft.no.
NS records for this zone are defined at copyleft.no.
Question and response
Question
dig mx.mail.postal.copyleft.no. NS
Answer
The response has no answer records.
Authority
copyleft.no. 300 SOA dns10.copyleft.no. hostmaster.copyleft.no. 3000010675 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0