Servidores DNS Principal (mname) y Secundario (rname)
host: inf.ua
class: IN
ttl: 3600
type: SOA
mname: ns1.1gb.ua
rname: noc.1gb.com.ua
serial: 2022052139
refresh: 1200
retry: 600
expire: 1209600
minimum-ttl: 3600

Servidor de Correo
host: inf.ua
class: IN
ttl: 3600
type: MX
pri: 8
target: mail-u4.1gb.ua