Servidores DNS Principal (mname) y Secundario (rname)
host: csb02.ru
class: IN
ttl: 21600
type: SOA
mname: ns1.ihc.ru
rname: info.ihc.ru
serial: 2014031401
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 3600

Servidor de Correo
host: csb02.ru
class: IN
ttl: 3333
type: MX
pri: 10
target: mail.csb02.ru