Registro DMARC
v=DMARC1; p=reject;

Servidores DNS Principal (mname) y Secundario (rname)
host: guapic.com
class: IN
ttl: 1800
type: SOA
mname: cesar.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2417104013
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800

Servidor de Correo
host: guapic.com
class: IN
ttl: 300
type: MX
pri: 76
target: route1.mx.cloudflare.net

Servidor de Correo
host: guapic.com
class: IN
ttl: 300
type: MX
pri: 9
target: route2.mx.cloudflare.net

Servidor de Correo
host: guapic.com
class: IN
ttl: 300
type: MX
pri: 89
target: route3.mx.cloudflare.net

Información TXT
host: guapic.com
class: IN
ttl: 300
type: TXT
txt: v=spf1 include:_spf.mx.cloudflare.net ~all
entries: Array