Registro DMARC
v=DMARC1; p=none

Servidores DNS Principal (mname) y Secundario (rname)
host: mantralingua.com
class: IN
ttl: 1800
type: SOA
mname: matt.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2371889093
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800

Servidor de Correo
host: mantralingua.com
class: IN
ttl: 300
type: MX
pri: 1
target: smtp.google.com

Información TXT
host: mantralingua.com
class: IN
ttl: 8600
type: TXT
txt: v=spf1 include:_spf.google.com include:authsmtp.com ~all
entries: Array