Servidores DNS Principal (mname) y Secundario (rname)
host: us3n.com
class: IN
ttl: 900
type: SOA
mname: dns1.yandex.net
rname: dns-hosting.yandex.ru
serial: 5
refresh: 900
retry: 90
expire: 86400
minimum-ttl: 900

Servidor de Correo
host: us3n.com
class: IN
ttl: 21600
type: MX
pri: 10
target: mx.yandex.net

Información TXT
host: us3n.com
class: IN
ttl: 21600
type: TXT
txt: v=spf1 redirect=_spf.yandex.net
entries: Array