Registro IPv4
host: MX.to
class: IN
ttl: 300
type: A
ip: 160.16.51.133

Servidores DNS Principal (mname) y Secundario (rname)
host: MX.to
class: IN
ttl: 300
type: SOA
mname: ns.monar.jp
rname: root.MX.to
serial: 4
refresh: 300
retry: 300
expire: 604800
minimum-ttl: 60

Servidor de Correo
host: MX.to
class: IN
ttl: 300
type: MX
pri: 10
target: hoge.sakura.ne.jp