Registro DMARC
v=DMARC1; p=quarantine

Servidores DNS Principal (mname) y Secundario (rname)
host: nls.es
class: IN
ttl: 1800
type: SOA
mname: keanu.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2384433016
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800

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

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

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

Información TXT
host: nls.es
class: IN
ttl: 300
type: TXT
txt: protonmail-verification=a3fe4cc3e70aab4c8d56e46a7adc25cd8d2e0d93
entries: Array