Servidores DNS Principal (mname) y Secundario (rname)
host: barracudabrts.com
class: IN
ttl: 900
type: SOA
mname: ns-621.awsdns-13.net
rname: awsdns-hostmaster.amazon.com
serial: 1
refresh: 7200
retry: 900
expire: 1209600
minimum-ttl: 86400

Servidor de Correo
host: barracudabrts.com
class: IN
ttl: 90
type: MX
pri: 10
target: ev-postfix-production-nlb-b369848d8fd0b0fa.elb.us-east-2.amazonaws.com