Registro DMARC
v=DMARC1; p=none; fo=0:1:d:s; ri=84600;

Servidores DNS Principal (mname) y Secundario (rname)
host: ossc.com
class: IN
ttl: 900
type: SOA
mname: ns-1502.awsdns-59.org
rname: awsdns-hostmaster.amazon.com
serial: 1
refresh: 7200
retry: 900
expire: 1209600
minimum-ttl: 86400

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

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