Servidores DNS Principal (mname) y Secundario (rname)
host: aslmi2.it
class: IN
ttl: 21600
type: SOA
mname: dns3.fastweb.it
rname: dnsmaster.fastweb.it
serial: 2019121000
refresh: 10800
retry: 900
expire: 604800
minimum-ttl: 86400

Servidor de Correo
host: aslmi2.it
class: IN
ttl: 21600
type: MX
pri: 10
target: srv-mx.aslmi2.it