Servidores DNS Principal (mname) y Secundario (rname)
host: nbedu.net.cn
class: IN
ttl: 86400
type: SOA
mname: ns1.sfn.cn
rname: root.ns1.sfn.cn
serial: 2024092502
refresh: 600
retry: 120
expire: 604800
minimum-ttl: 7200

Servidor de Correo
host: nbedu.net.cn
class: IN
ttl: 600
type: MX
pri: 5
target: mxbiz1.qq.com

Servidor de Correo
host: nbedu.net.cn
class: IN
ttl: 600
type: MX
pri: 10
target: mxbiz2.qq.com