Servidores DNS Principal (mname) y Secundario (rname)
host: cheonha.co.kr
class: IN
ttl: 1800
type: SOA
mname: cheonha.co.kr
rname: postmaster.cheonha.co.kr
serial: 20240302
refresh: 10800
retry: 3600
expire: 3600000
minimum-ttl: 43200

Servidor de Correo
host: cheonha.co.kr
class: IN
ttl: 1800
type: MX
pri: 10
target: uws8-wpm-036.cafe24.com