Registro DMARC
v=DMARC1; p=reject;

Servidores DNS Principal (mname) y Secundario (rname)
host: granitesavingsbank.com
class: IN
ttl: 900
type: SOA
mname: ns-586.awsdns-09.net
rname: awsdns-hostmaster.amazon.com
serial: 1
refresh: 7200
retry: 900
expire: 1209600
minimum-ttl: 86400

Servidor de Correo
host: granitesavingsbank.com
class: IN
ttl: 300
type: MX
pri: 10
target: mxb.mailgun.org

Servidor de Correo
host: granitesavingsbank.com
class: IN
ttl: 300
type: MX
pri: 10
target: mxa.mailgun.org

Información TXT
host: granitesavingsbank.com
class: IN
ttl: 300
type: TXT
txt: v=spf1 include:mailgun.org ~all
entries: Array