Registro DMARC
v=DMARC1;  p=none; rua=mailto:603aa3950c5749f99b8b310982f297c0@dmarc-reports.cloudflare.net

Servidores DNS Principal (mname) y Secundario (rname)
host: realtz.com
class: IN
ttl: 1800
type: SOA
mname: ian.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2354027150
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800

Servidor de Correo
host: realtz.com
class: IN
ttl: 300
type: MX
pri: 10
target: mail.realtz.com

Información TXT
host: realtz.com
class: IN
ttl: 300
type: TXT
txt: v=spf1 mx ~all
entries: Array