Registro DMARC
v=spf1 -all

Servidor de Correo
host: intercambiosvirtual.com.org
class: IN
ttl: 600
type: MX
pri: 1000
target: 0.0.0.0

Información TXT
host: intercambiosvirtual.com.org
class: IN
ttl: 600
type: TXT
txt: v=spf1 -all
entries: Array