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: a-toppolymers.net
class: IN
ttl: 21600
type: SOA
mname: ns10.digicertdns.com
rname: dns.digicertdns.com
serial: 2009010107
refresh: 43200
retry: 3600
expire: 1209600
minimum-ttl: 180

Información TXT
host: a-toppolymers.net
class: IN
ttl: 1800
type: TXT
txt: v=spf1 -all
entries: Array