mx04.totaal.net has no CNAME records.
Question and response
Question
dig mx04.totaal.net. NS
Answer
The response has no answer records.
Authority
totaal.net. 600 SOA ns.totaal.net. postmaster.totaalnet.nl. 2026021601 28800 7200 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0