Registro DMARC
v=DMARC1; p=reject; rua=mailto:dmarc@firma.com.mx; ruf=mailto:dmarc@firma.com.mx; fo=1

Registro IPv4
host: firma.com.mx
class: IN
ttl: 2864
type: A
ip: 204.44.192.88

Servidores DNS Principal (mname) y Secundario (rname)
host: firma.com.mx
class: IN
ttl: 2864
type: SOA
mname: ns1-ws09.servername.online
rname: camelista.yahoo.com
serial: 2026081102
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 10800

Servidor de Correo
host: firma.com.mx
class: IN
ttl: 2864
type: MX
pri: 10
target: mx1.spamshield.io

Servidor de Correo
host: firma.com.mx
class: IN
ttl: 2864
type: MX
pri: 40
target: mx4.spamshield.io

Servidor de Correo
host: firma.com.mx
class: IN
ttl: 2864
type: MX
pri: 20
target: mx2.spamshield.io

Servidor de Correo
host: firma.com.mx
class: IN
ttl: 2864
type: MX
pri: 30
target: mx3.spamshield.io

Información TXT
host: firma.com.mx
class: IN
ttl: 2864
type: TXT
txt: v=spf1 +a +mx +include:spf.servername.online -all
entries: Array

Información TXT
host: firma.com.mx
class: IN
ttl: 2864
type: TXT
txt: ms=892e3cab7d71e3659d7a05ddd823a511aeb09eec
entries: Array