Servidores DNS Principal (mname) y Secundario (rname)
host: lctu.cn
class: IN
ttl: 3600
type: SOA
mname: 
rname: hostmaster.nameserver
serial: 269
refresh: 28800
retry: 7200
expire: 604800
minimum-ttl: 5

Servidor de Correo
host: lctu.cn
class: IN
ttl: 3600
type: MX
pri: 5
target: mxbiz1.qq.com

Servidor de Correo
host: lctu.cn
class: IN
ttl: 3600
type: MX
pri: 10
target: mxbiz2.qq.com

Información TXT
host: lctu.cn
class: IN
ttl: 3600
type: TXT
txt: v=spf1 include:spf.mail.qq.com ~all
entries: Array