Registro DMARC
v=DMARC1;p=reject;aspf=r; rua=mailto:ahuqn0xa@ag.dmarcian.com; ruf=mailto:ahuqn0xa@fr.dmarcian.com;pct=100;rf=afrf

Servidores DNS Principal (mname) y Secundario (rname)
host: cvn21.net
class: IN
ttl: 900
type: SOA
mname: ns-97.awsdns-12.com
rname: awsdns-hostmaster.amazon.com
serial: 1
refresh: 7200
retry: 900
expire: 1209600
minimum-ttl: 86400

Información TXT
host: cvn21.net
class: IN
ttl: 300
type: TXT
txt: v=spf1 -all
entries: Array