mail.kpdrift.dk has no CNAME records.
Question and response
Question
dig mail.kpdrift.dk. NS
Answer
The response has no answer records.
Authority
kpdrift.dk. 3257 SOA ns2.dnsservers.dk. admin.dnsservers.dk. 2025071605 900 600 86400 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0