Registro DMARC
v=DMARC1; p=quarantine

Servidores DNS Principal (mname) y Secundario (rname)
host: iter.io
class: IN
ttl: 900
type: SOA
mname: ns-704.awsdns-24.net
rname: awsdns-hostmaster.amazon.com
serial: 1
refresh: 7200
retry: 900
expire: 1209600
minimum-ttl: 86400

Servidor de Correo
host: iter.io
class: IN
ttl: 300
type: MX
pri: 20
target: mailsec.protonmail.ch

Servidor de Correo
host: iter.io
class: IN
ttl: 300
type: MX
pri: 10
target: mail.protonmail.ch

Información TXT
host: iter.io
class: IN
ttl: 300
type: TXT
txt: v=spf1 include:_spf.protonmail.ch ~all
entries: Array

Información TXT
host: iter.io
class: IN
ttl: 300
type: TXT
txt: protonmail-verification=f76dc33c8f107dee31499b53837b9d94269b7dd5
entries: Array