Servidores DNS Principal (mname) y Secundario (rname)
host: ulm.edu.mx
class: IN
ttl: 21600
type: SOA
mname: dns.ulm.edu.mx
rname: root.ulm.edu.mx
serial: 4
refresh: 1200
retry: 300
expire: 604800
minimum-ttl: 1800

Servidor de Correo
host: ulm.edu.mx
class: IN
ttl: 21600
type: MX
pri: 1
target: aspmx.l.google.com

Servidor de Correo
host: ulm.edu.mx
class: IN
ttl: 21600
type: MX
pri: 5
target: alt1.aspmx.l.google.com

Servidor de Correo
host: ulm.edu.mx
class: IN
ttl: 21600
type: MX
pri: 10
target: aspmx2.googlemail.com

Servidor de Correo
host: ulm.edu.mx
class: IN
ttl: 21600
type: MX
pri: 5
target: alt2.aspmx.l.google.com