Servidores DNS Principal (mname) y Secundario (rname)
host: lhymss.edu.hk
class: IN
ttl: 900
type: SOA
mname: dnshost1.on-nets.com
rname: dns.on-nets.com
serial: 2020123100
refresh: 10800
retry: 3600
expire: 86400
minimum-ttl: 900

Servidor de Correo
host: lhymss.edu.hk
class: IN
ttl: 900
type: MX
pri: 5
target: intranet.lhymss.edu.hk

Servidor de Correo
host: lhymss.edu.hk
class: IN
ttl: 900
type: MX
pri: 10
target: mail.lhymss.edu.hk