Registro IPv4
host: mail.emailsrvr.com
class: IN
ttl: 2553
type: A
ip: 173.203.187.14

host: mail.vanguardia.com.mx
class: IN
ttl: 300
type: CNAME
target: mail.emailsrvr.com

Servidor de Correo
host: mail.emailsrvr.com
class: IN
ttl: 21600
type: MX
pri: 20
target: mx2.emailsrvr.com

Servidor de Correo
host: mail.emailsrvr.com
class: IN
ttl: 21600
type: MX
pri: 10
target: mx1.emailsrvr.com