Registro DMARC
v=DMARC1; p=reject; rua=mailto:c4c4aa8a07d9.a@dmarcinput.com; ruf=mailto:c4c4aa8a07d9.f@dmarcinput.com; sp=none; fo=1

Servidores DNS Principal (mname) y Secundario (rname)
host: duocircle.io
class: IN
ttl: 1800
type: SOA
mname: henry.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2360728119
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800

Servidor de Correo
host: duocircle.io
class: IN
ttl: 300
type: MX
pri: 1
target: mx1.mailhop.org

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