Servidores DNS Principal (mname) y Secundario (rname)
host: synnet.de
class: IN
ttl: 2788
type: SOA
mname: ns1.plusserver.com
rname: hostmaster.plusserver.com
serial: 2020300403
refresh: 1800
retry: 900
expire: 604800
minimum-ttl: 900

Servidor de Correo
host: synnet.de
class: IN
ttl: 600
type: MX
pri: 100
target: mx00.t-online.de