Registro DMARC
v=DMARC1; p=none;

Servidores DNS Principal (mname) y Secundario (rname)
host: ntt-security.com
class: IN
ttl: 3600
type: SOA
mname: ns1.messagingengine.com
rname: postmaster.messagingengine.com
serial: 2026062900
refresh: 86208
retry: 600
expire: 1209600
minimum-ttl: 3600

Servidor de Correo
host: ntt-security.com
class: IN
ttl: 3600
type: MX
pri: 10
target: in1-smtp.messagingengine.com

Servidor de Correo
host: ntt-security.com
class: IN
ttl: 3600
type: MX
pri: 20
target: in2-smtp.messagingengine.com

Información TXT
host: ntt-security.com
class: IN
ttl: 3600
type: TXT
txt: v=spf1 include:spf.messagingengine.com ?all
entries: Array