mailfb.speerit.nl has no CNAME records.
Question and response
Question
dig mailfb.speerit.nl. NS
Answer
The response has no answer records.
Authority
speerit.nl. 617 SOA ns3.argewebhosting.nl. plesk.cldin.eu. 2026022703 10800 3600 604800 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0