_spf.cobytes.email has no CNAME records.
Question and response
Question
dig _spf.cobytes.email. NS
Answer
The response has no answer records.
Authority
cobytes.email. 300 SOA ns1.cobytes.io. hostmaster.cobytes.io. 2026011500 14400 3600 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0