Registro DMARC
v=DMARC1;p=reject;rua=mailto:dmarc@issfa.mil.ec

Servidores DNS Principal (mname) y Secundario (rname)
host: issfa.mil.ec
class: IN
ttl: 21600
type: SOA
mname: ns1.telconet.net
rname: abuse.telconet.net
serial: 40
refresh: 10800
retry: 3600
expire: 2419200
minimum-ttl: 900

Servidor de Correo
host: issfa.mil.ec
class: IN
ttl: 3600
type: MX
pri: 0
target: mail.issfa.mil.ec

Información TXT
host: issfa.mil.ec
class: IN
ttl: 3600
type: TXT
txt: v=spf1 mx a  ~all
entries: Array