Registro DMARC
v=DMARC1; p=reject; fo=1; rua=mailto:dmarc_agg@vali.email

Servidores DNS Principal (mname) y Secundario (rname)
host: arc.ab.ca
class: IN
ttl: 3600
type: SOA
mname: ns1-07.azure-dns.com
rname: azuredns-hostmaster.microsoft.com
serial: 1
refresh: 3600
retry: 300
expire: 2419200
minimum-ttl: 300

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

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