Servidores DNS Principal (mname) y Secundario (rname)
host: dd-edu.co.kr
class: IN
ttl: 3600
type: SOA
mname: ns.gabia.co.kr
rname: hosting.gabia.com
serial: 2019011117
refresh: 1800
retry: 600
expire: 1209600
minimum-ttl: 86400

Servidor de Correo
host: dd-edu.co.kr
class: IN
ttl: 3600
type: MX
pri: 10
target: aspmx.daum.net

Servidor de Correo
host: dd-edu.co.kr
class: IN
ttl: 3600
type: MX
pri: 20
target: alt.aspmx.daum.net