mxscan1.mhhosting.dk has no CNAME records.
Question and response
Question
dig mxscan1.mhhosting.dk. NS
Answer
The response has no answer records.
Authority
mhhosting.dk. 295 SOA DNS01.mhhosting.dk. hostmaster.mhhosting.dk. 1291031409 10800 3600 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0