Registro IPv4
host: 50zc.com
class: IN
ttl: 600
type: A
ip: 127.0.0.1

Servidores DNS Principal (mname) y Secundario (rname)
host: 50zc.com
class: IN
ttl: 7200
type: SOA
mname: ns1.xundns.com
rname: nsadmin.xundns.com
serial: 159656
refresh: 3600
retry: 600
expire: 604800
minimum-ttl: 600

Servidor de Correo
host: 50zc.com
class: IN
ttl: 600
type: MX
pri: 10
target: mxdomain.qq.com