Registro DMARC
v=DMARC1; p=none;

Servidores DNS Principal (mname) y Secundario (rname)
host: mycoolserver.com
class: IN
ttl: 1800
type: SOA
mname: dale.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2391834805
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800

Servidor de Correo
host: mycoolserver.com
class: IN
ttl: 300
type: MX
pri: 20
target: mx2.improvmx.com

Servidor de Correo
host: mycoolserver.com
class: IN
ttl: 300
type: MX
pri: 10
target: mx1.improvmx.com

Información TXT
host: mycoolserver.com
class: IN
ttl: 300
type: TXT
txt: v=spf1 include:spf.efwd.registrar-servers.com include:spf.improvmx.com ~all
entries: Array