Registro DMARC
v=DMARC1; p=none

Servidores DNS Principal (mname) y Secundario (rname)
host: tristarec.com
class: IN
ttl: 7200
type: SOA
mname: DNS103.REGISTER.com
rname: root.REGISTER.com
serial: 120042815
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 3600

Servidor de Correo
host: tristarec.com
class: IN
ttl: 3600
type: MX
pri: 10
target: mail.mail.tristarec.com

Información TXT
host: tristarec.com
class: IN
ttl: 3600
type: TXT
txt: v=spf1 +a +mx +a:ip-172-31-93-206.ec2.internal -all
entries: Array