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

Servidores DNS Principal (mname) y Secundario (rname)
host: tripod.com
class: IN
ttl: 17847
type: SOA
mname: nsd1.squarespacedns.com
rname: cloud-dns-hostmaster.google.com
serial: 1
refresh: 21600
retry: 3600
expire: 259200
minimum-ttl: 300

Información TXT
host: tripod.com
class: IN
ttl: 10646
type: TXT
txt: v=spf1 -all
entries: Array