Servidores DNS Principal (mname) y Secundario (rname)
host: itpuebla.edu.mx
class: IN
ttl: 21600
type: SOA
mname: ns1.itpuebla.edu.mx
rname: please_set_email.absolutely.nowhere
serial: 53447800
refresh: 10800
retry: 3600
expire: 2419200
minimum-ttl: 900

Servidor de Correo
host: itpuebla.edu.mx
class: IN
ttl: 3600
type: MX
pri: 0
target: itpuebla-edu-mx.mail.protection.outlook.com