_spf.intermax.nl has no CNAME records.
Question and response
Question
dig _spf.intermax.nl. NS
Answer
The response has no answer records.
Authority
intermax.nl. 704 SOA ns1.intermax.nl. hostmaster.intermax.nl. 2026022304 28800 7200 604800 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0