dk.noanet.net has no MX records.
Question and response
Question
dig dk.noanet.net. MX
Answer
The response has no answer records.
Authority
noanet.net. 7200 SOA ns1.noanet.net. hostmaster.noanet.net. 2026022001 900 7200 604800 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0