Registro DMARC
v=DMARC1; p=quarantine

Servidores DNS Principal (mname) y Secundario (rname)
host: greybeard95a.com
class: IN
ttl: 21600
type: SOA
mname: ns1.he.net
rname: hostmaster.he.net
serial: 2023060101
refresh: 14400
retry: 14400
expire: 1209600
minimum-ttl: 86400

Servidor de Correo
host: greybeard95a.com
class: IN
ttl: 21600
type: MX
pri: 10
target: mail.protonmail.ch

Servidor de Correo
host: greybeard95a.com
class: IN
ttl: 21600
type: MX
pri: 20
target: mailsec.protonmail.ch

Información TXT
host: greybeard95a.com
class: IN
ttl: 21600
type: TXT
txt: protonmail-verification=7d5bb1c3cc2cb4635e1364412e22222cd2b772d7
entries: Array

Información TXT
host: greybeard95a.com
class: IN
ttl: 21600
type: TXT
txt: v=spf1 include:_spf.protonmail.ch mx ~all
entries: Array