Registro DMARC
v=DMARC1; p=reject; sp=reject; aspf=s; adkim=s;

Servidores DNS Principal (mname) y Secundario (rname)
host: protec-eyecare.com
class: IN
ttl: 2421
type: SOA
mname: ns03.gcd-dns.com
rname: dns.jomax.net
serial: 2025020501
refresh: 28800
retry: 7200
expire: 604800
minimum-ttl: 600

Información TXT
host: protec-eyecare.com
class: IN
ttl: 434
type: TXT
txt: v=spf1 -all
entries: v=spf1 -all