Registro DMARC
v=spf1 ip4:54.36.214.240 -all

Servidores DNS Principal (mname) y Secundario (rname)
host: macreason.com
class: IN
ttl: 3600
type: SOA
mname: ns-2012.awsdns-59.co.uk
rname: awsdns-hostmaster.amazon.com
serial: 1
refresh: 7200
retry: 900
expire: 1209600
minimum-ttl: 86400

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

Información TXT
host: macreason.com
class: IN
ttl: 3600
type: TXT
txt: v=spf1 ip4:54.36.214.240 -all
entries: Array