Registro IPv4
host: smartbiz.com
class: IN
ttl: 600
type: A
ip: 71.6.106.161

Servidores DNS Principal (mname) y Secundario (rname)
host: smartbiz.com
class: IN
ttl: 600
type: SOA
mname: ns.smartbiz.com
rname: hostmaster.smartbiz.com
serial: 2018091201
refresh: 86400
retry: 7200
expire: 3600000
minimum-ttl: 300

Servidor de Correo
host: smartbiz.com
class: IN
ttl: 600
type: MX
pri: 10
target: mail.smartbiz.com