Registro DMARC
v=DMARC1; p=none;

Registro IPv4
host: classi4u.com
class: IN
ttl: 1355
type: A
ip: 35.190.86.134

Servidores DNS Principal (mname) y Secundario (rname)
host: classi4u.com
class: IN
ttl: 8555
type: SOA
mname: ns-cloud-e1.googledomains.com
rname: cloud-dns-hostmaster.google.com
serial: 13
refresh: 21600
retry: 3600
expire: 259200
minimum-ttl: 300

Servidor de Correo
host: classi4u.com
class: IN
ttl: 1355
type: MX
pri: 10
target: mx.sendgrid.net