Registro DMARC
v=DMARC1; p=reject;

Registro IPv4
host: openwebmail.org
class: IN
ttl: 300
type: A
ip: 172.118.142.164

Servidores DNS Principal (mname) y Secundario (rname)
host: openwebmail.org
class: IN
ttl: 300
type: SOA
mname: ns-cloud-e1.googledomains.com
rname: cloud-dns-hostmaster.google.com
serial: 38
refresh: 21600
retry: 3600
expire: 259200
minimum-ttl: 300

Servidor de Correo
host: Openwebmail.org
class: IN
ttl: 300
type: MX
pri: 10
target: mx.Openwebmail.org

Información TXT
host: Openwebmail.org
class: IN
ttl: 300
type: TXT
txt: v=spf1 mx include:sendgrid.net -all
entries: