Servidores DNS Principal (mname) y Secundario (rname)
host: smimgmt.com
class: IN
ttl: 300
type: SOA
mname: ns-cloud-b1.googledomains.com
rname: cloud-dns-hostmaster.google.com
serial: 4
refresh: 21600
retry: 3600
expire: 259200
minimum-ttl: 300

Servidor de Correo
host: smimgmt.com
class: IN
ttl: 3600
type: MX
pri: 5
target: alt2.aspmx.l.google.com

Servidor de Correo
host: smimgmt.com
class: IN
ttl: 3600
type: MX
pri: 5
target: alt1.aspmx.l.google.com

Servidor de Correo
host: smimgmt.com
class: IN
ttl: 3600
type: MX
pri: 10
target: alt3.aspmx.l.google.com

Servidor de Correo
host: smimgmt.com
class: IN
ttl: 3600
type: MX
pri: 1
target: aspmx.l.google.com

Servidor de Correo
host: smimgmt.com
class: IN
ttl: 3600
type: MX
pri: 10
target: alt4.aspmx.l.google.com

Información TXT
host: smimgmt.com
class: IN
ttl: 3600
type: TXT
txt: v=spf1 include:_spf.google.com ~all
entries: Array