Registro DMARC
v=DMARC1; p=reject;

Registro IPv4
host: sbsmkt.com
class: IN
ttl: 300
type: A
ip: 69.20.51.128

Servidores DNS Principal (mname) y Secundario (rname)
host: sbsmkt.com
class: IN
ttl: 300
type: SOA
mname: ns.rackspace.com
rname: hostmaster.rackspace.com
serial: 1717412821
refresh: 3600
retry: 300
expire: 1814400
minimum-ttl: 300

Servidor de Correo
host: sbsmkt.com
class: IN
ttl: 21600
type: MX
pri: 10
target: mxa.mailgun.org

Servidor de Correo
host: sbsmkt.com
class: IN
ttl: 21600
type: MX
pri: 11
target: mxb.mailgun.org

Información TXT
host: sbsmkt.com
class: IN
ttl: 21600
type: TXT
txt: v=spf1 include:mailgun.org ~all
entries: Array