Registro DMARC
v=DMARC1; p=reject;

Servidores DNS Principal (mname) y Secundario (rname)
host: inszoneinc.com
class: IN
ttl: 3600
type: SOA
mname: ns1.inszone.net
rname: hostmaster.inszone.net
serial: 2026092317
refresh: 300
retry: 600
expire: 2419200
minimum-ttl: 300

Servidor de Correo
host: inszoneinc.com
class: IN
ttl: 3600
type: MX
pri: 0
target: 

Información TXT
host: inszoneinc.com
class: IN
ttl: 3600
type: TXT
txt: v=spf1 -all
entries: Array