Servidores DNS Principal (mname) y Secundario (rname)
host: kion.it
class: IN
ttl: 21600
type: SOA
mname: dns.cineca.com
rname: hostmaster.cineca.it
serial: 2020032413
refresh: 86400
retry: 7200
expire: 2592000
minimum-ttl: 86400

Servidor de Correo
host: kion.it
class: IN
ttl: 21600
type: MX
pri: 10
target: localhost.kion.it