Servidores DNS Principal (mname) y Secundario (rname)
host: sigkill.at
class: IN
ttl: 600
type: SOA
mname: ns1.first-ns.de
rname: postmaster.robot.first-ns.de
serial: 2018120202
refresh: 600
retry: 100
expire: 604800
minimum-ttl: 100

Servidor de Correo
host: sigkill.at
class: IN
ttl: 600
type: MX
pri: 10
target: mail.sigkill.at

Información TXT
host: sigkill.at
class: IN
ttl: 600
type: TXT
txt: v=spf1 mx -all
entries: Array