Registro DMARC
v=spf1 -all

Registro IPv4
host: error.ref.com
class: IN
ttl: 604800
type: A
ip: 54.235.96.128

Servidor de Correo
host: error.ref.com
class: IN
ttl: 604800
type: MX
pri: 1000
target: 0.0.0.0

Información TXT
host: error.ref.com
class: IN
ttl: 604800
type: TXT
txt: v=spf1 -all
entries: Array