Registro DMARC
v=DMARC1; p=reject; rua=mailto:admin@stbbr.com; ruf=mailto:admin@stbbr.com; adkim=s; aspf=s

Servidores DNS Principal (mname) y Secundario (rname)
host: stbbr.com
class: IN
ttl: 1800
type: SOA
mname: anuj.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2415045997
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800

Servidor de Correo
host: stbbr.com
class: IN
ttl: 300
type: MX
pri: 10
target: mail.stbbr.com

Información TXT
host: stbbr.com
class: IN
ttl: 300
type: TXT
txt: v=spf1 ip4:57.129.117.152 ip6:2001:41d0:701:1000::1e85 a:mail.stbbr.com mx ~all
entries: Array