Registro DMARC
v=DMARC1; p=reject; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com

Servidores DNS Principal (mname) y Secundario (rname)
host: mda-isi.com
class: IN
ttl: 90
type: SOA
mname: ns1.maxar.com
rname: postmaster.maxar.com
serial: 8
refresh: 14400
retry: 1800
expire: 2419200
minimum-ttl: 60

Servidor de Correo
host: mda-isi.com
class: IN
ttl: 90
type: MX
pri: 0
target: 

Información TXT
host: mda-isi.com
class: IN
ttl: 90
type: TXT
txt: v=spf1 -all
entries: Array