Registro DMARC
v=DMARC1; p=reject;

Servidores DNS Principal (mname) y Secundario (rname)
host: ceamfg.com
class: IN
ttl: 21600
type: SOA
mname: ns11.constellix.com
rname: dns.constellix.com
serial: 2015010104
refresh: 43200
retry: 3600
expire: 1209600
minimum-ttl: 180

Servidor de Correo
host: ceamfg.com
class: IN
ttl: 300
type: MX
pri: 0
target: ceamfg.com

Información TXT
host: ceamfg.com
class: IN
ttl: 300
type: TXT
txt: v=spf1 -all
entries: Array