Registro DMARC
v=spf1 include:mailgun.org ~all

Registro IPv4
host: apphb.com
class: IN
ttl: 300
type: A
ip: 184.72.232.223

Servidores DNS Principal (mname) y Secundario (rname)
host: apphb.com
class: IN
ttl: 1800
type: SOA
mname: karl.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2352494789
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800

Servidor de Correo
host: apphb.com
class: IN
ttl: 300
type: MX
pri: 10
target: mxb.mailgun.org

Servidor de Correo
host: apphb.com
class: IN
ttl: 300
type: MX
pri: 10
target: mxa.mailgun.org

Información TXT
host: apphb.com
class: IN
ttl: 300
type: TXT
txt: v=spf1 include:mailgun.org ~all
entries: Array