Servidores DNS Principal (mname) y Secundario (rname)
host: cro.cl
class: IN
ttl: 300
type: SOA
mname: ns1.dreamhost.com
rname: hostmaster.dreamhost.com
serial: 2023100100
refresh: 20024
retry: 600
expire: 1814400
minimum-ttl: 300

Servidor de Correo
host: cro.cl
class: IN
ttl: 300
type: MX
pri: 0
target: aspmx.l.google.com