Registro DMARC
v=DMARC1; p=none;

Registro IPv4
host: cbtis249.edu.mx
class: IN
ttl: 3600
type: A
ip: 74.208.51.117

Servidores DNS Principal (mname) y Secundario (rname)
host: cbtis249.edu.mx
class: IN
ttl: 86400
type: SOA
mname: ns1045.ui-dns.com
rname: hostmaster.1und1.com
serial: 2017060104
refresh: 28800
retry: 7200
expire: 604800
minimum-ttl: 600

Servidor de Correo
host: cbtis249.edu.mx
class: IN
ttl: 3600
type: MX
pri: 10
target: mx00.ionos.mx

Servidor de Correo
host: cbtis249.edu.mx
class: IN
ttl: 3600
type: MX
pri: 10
target: mx01.ionos.mx