_spf.nexxera.com has no CNAME records.
Question and response
Question
dig _spf.nexxera.com. NS
Answer
The response has no answer records.
Authority
nexxera.com. 900 SOA ns-67.awsdns-08.com. awsdns-hostmaster.amazon.com. 2024082865 7200 900 1209600 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0