smtp01-out03.oderland.net has no CNAME records.
Question and response
Question
dig smtp01-out03.oderland.net. NS
Answer
The response has no answer records.
Authority
oderland.net. 300 SOA ns.oderland.net. registry.oderland.se. 2026030203 10800 3600 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0