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: 300
type: A
ip: 104.21.58.172

Registro IPv4
host: firma.com.mx
class: IN
ttl: 300
type: A
ip: 172.67.162.79

Servidores DNS Principal (mname) y Secundario (rname)
host: firma.com.mx
class: IN
ttl: 1800
type: SOA
mname: carlane.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2416072208
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800

Servidor de Correo
host: firma.com.mx
class: IN
ttl: 300
type: MX
pri: 30
target: mx3.spamshield.io

Servidor de Correo
host: firma.com.mx
class: IN
ttl: 300
type: MX
pri: 40
target: mx4.spamshield.io

Servidor de Correo
host: firma.com.mx
class: IN
ttl: 300
type: MX
pri: 10
target: mx1.spamshield.io

Servidor de Correo
host: firma.com.mx
class: IN
ttl: 300
type: MX
pri: 20
target: mx2.spamshield.io

Información TXT
host: firma.com.mx
class: IN
ttl: 300
type: TXT
txt: ms=892e3cab7d71e3659d7a05ddd823a511aeb09eec
entries: Array

Información TXT
host: firma.com.mx
class: IN
ttl: 300
type: TXT
txt: v=spf1 +a +mx +include:spf.servername.online -all
entries: Array

Registro IPv6
host: firma.com.mx
class: IN
ttl: 300
type: AAAA
ipv6: 2606:4700:3037::6815:3aac

Registro IPv6
host: firma.com.mx
class: IN
ttl: 300
type: AAAA
ipv6: 2606:4700:3032::ac43:a24f