Registro DMARC
v=DMARC1;p=reject;sp=reject;adkim=s;aspf=s

Servidores DNS Principal (mname) y Secundario (rname)
host: purchasedprotectionplan.com
class: IN
ttl: 900
type: SOA
mname: ns5.assurant.com
rname: network.assurant.com
serial: 11
refresh: 10800
retry: 3600
expire: 1728000
minimum-ttl: 900

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