Servidores DNS Principal (mname) y Secundario (rname)
host: etmh.org
class: IN
ttl: 604800
type: SOA
mname: dns1.name-services.com
rname: info.name-services.com
serial: 1680744301
refresh: 172800
retry: 900
expire: 1814400
minimum-ttl: 300

Servidor de Correo
host: etmh.org
class: IN
ttl: 604800
type: MX
pri: 10
target: mail.etmh.org