spf.crowdtech.com has no CNAME records.
Question and response
Question
dig spf.crowdtech.com. NS
Answer
The response has no answer records.
Authority
crowdtech.com. 54 SOA ns-s.dns.yourhosting.nl. hostmaster.firstfind.nl. 2026012604 16384 2048 1048576 14400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0