Registro DMARC
v=DMARC1; p=reject;

Servidores DNS Principal (mname) y Secundario (rname)
host: nucleuscentral.co
class: IN
ttl: 3600
type: SOA
mname: ns01.gcd-dns.com
rname: dns.jomax.net
serial: 2025062701
refresh: 28800
retry: 7200
expire: 604800
minimum-ttl: 600

Información TXT
host: nucleuscentral.co
class: IN
ttl: 600
type: TXT
txt: v=spf1 mx -all
entries: Array