Servidores DNS Principal (mname) y Secundario (rname)
host: palms-ent.com
class: IN
ttl: 86400
type: SOA
mname: ns20.digicertdns.com
rname: dns.digicertdns.com
serial: 2009010102
refresh: 43200
retry: 3600
expire: 1209600
minimum-ttl: 180

Servidor de Correo
host: palms-ent.com
class: IN
ttl: 1800
type: MX
pri: 10
target: mail.palms-ent.com