Registro DMARC
v=spf1 ip4:51.75.59.124  -all

Servidores DNS Principal (mname) y Secundario (rname)
host: elseveier.com
class: IN
ttl: 3600
type: SOA
mname: ns-617.awsdns-13.net
rname: awsdns-hostmaster.amazon.com
serial: 1
refresh: 7200
retry: 900
expire: 1209600
minimum-ttl: 86400

Servidor de Correo
host: elseveier.com
class: IN
ttl: 3600
type: MX
pri: 0
target: mx.elseveier.com

Información TXT
host: elseveier.com
class: IN
ttl: 3600
type: TXT
txt: v=spf1 ip4:51.75.59.124  -all
entries: Array