Servidores DNS Principal (mname) y Secundario (rname)
host: blacknett.com
class: IN
ttl: 1800
type: SOA
mname: kobe.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2341304737
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800

Servidor de Correo
host: blacknett.com
class: IN
ttl: 300
type: MX
pri: 1
target: mail.blacknett.com