_spf.arsys.es has no CNAME records.
Question and response
Question
dig _spf.arsys.es. NS
Answer
The response has no answer records.
Authority
arsys.es. 600 SOA ns-arsys.ui-dns.es. dnsadmin.ionos.com. 2026014109 14400 3600 605000 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0