Registro DMARC
v=DMARC1; p=quarantine

Servidores DNS Principal (mname) y Secundario (rname)
host: unthan.com
class: IN
ttl: 86400
type: SOA
mname: ns1121.ui-dns.de
rname: hostmaster.1und1.com
serial: 2017060141
refresh: 28800
retry: 7200
expire: 604800
minimum-ttl: 600

Servidor de Correo
host: unthan.com
class: IN
ttl: 3600
type: MX
pri: 0
target: unthan-com.mail.protection.outlook.com

Información TXT
host: unthan.com
class: IN
ttl: 3600
type: TXT
txt: v=spf1 include:spf.protection.outlook.com -all
entries: Array