Servidores DNS Principal (mname) y Secundario (rname)
host: biz.ua
class: IN
ttl: 600
type: SOA
mname: ns1.uadns.com
rname: hostmaster.drs.ua
serial: 2020409423
refresh: 1800
retry: 900
expire: 604800
minimum-ttl: 3600

Servidor de Correo
host: biz.ua
class: IN
ttl: 600
type: MX
pri: 10
target: mx1.biz.ua.uadns.com

Servidor de Correo
host: biz.ua
class: IN
ttl: 600
type: MX
pri: 20
target: mx2.biz.ua.uadns.com

Servidor de Correo
host: biz.ua
class: IN
ttl: 600
type: MX
pri: 30
target: mx3.biz.ua.uadns.com