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

Servidores DNS Principal (mname) y Secundario (rname)
host: leandna.net
class: IN
ttl: 900
type: SOA
mname: ns-373.awsdns-46.com
rname: awsdns-hostmaster.amazon.com
serial: 1
refresh: 7200
retry: 900
expire: 1209600
minimum-ttl: 86400

Información TXT
host: leandna.net
class: IN
ttl: 3600
type: TXT
txt: v=spf1 -all
entries: Array