Servidores DNS Principal (mname) y Secundario (rname)
host: arch.net
class: IN
ttl: 600
type: SOA
mname: ns2.archwireless.com
rname: hostmastertx.spok.com
serial: 37
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 600

Servidor de Correo
host: arch.net
class: IN
ttl: 600
type: MX
pri: 5
target: mailmx.usamobility.net