Servidores DNS Principal (mname) y Secundario (rname)
host: 52ls.cc
class: IN
ttl: 1800
type: SOA
mname: clyde.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2357993123
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800

Servidor de Correo
host: 52ls.cc
class: IN
ttl: 600
type: MX
pri: 5
target: mxbiz1.qq.com

Servidor de Correo
host: 52ls.cc
class: IN
ttl: 600
type: MX
pri: 10
target: mxbiz2.qq.com