spf3.snel.com has no CNAME records.
Question and response
Question
dig spf3.snel.com. NS
Answer
The response has no answer records.
Authority
snel.com. 1688 SOA linda.ns.cloudflare.com. dns.cloudflare.com. 2397565023 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0