Registro DMARC
v=DMARC1; p=none;

Servidores DNS Principal (mname) y Secundario (rname)
host: smartbuildersuite.com
class: IN
ttl: 1677
type: SOA
mname: alex.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2402697370
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800

Servidor de Correo
host: smartbuildersuite.com
class: IN
ttl: 177
type: MX
pri: 30
target: mx.smartbuildersuite.com