spf.versio.nl has no CNAME records.
Question and response
Question
dig spf.versio.nl. NS
Answer
The response has no answer records.
Authority
versio.nl. 3600 SOA ns1.cldin.eu. hostmaster.versio.nl. 1772026915 3600 900 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0