Registro DMARC
v=DMARC1; p=reject; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com

Servidores DNS Principal (mname) y Secundario (rname)
host: usaa.net
class: IN
ttl: 3600
type: SOA
mname: a1-88.akam.net
rname: hostmaster.usaa.com
serial: 1663883331
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 900

Información TXT
host: usaa.net
class: IN
ttl: 900
type: TXT
txt: v=spf1 -all
entries: Array