Registro DMARC
v=spf1 ip4:72.249.57.158 include:relay.mailchannels.net +ip4:67.227.206.84 +ip4:67.227.206.108 +a +mx ~all

Registro IPv4
host: tresmil400.mx
class: IN
ttl: 300
type: A
ip: 72.249.57.158

Servidores DNS Principal (mname) y Secundario (rname)
host: tresmil400.mx
class: IN
ttl: 86400
type: SOA
mname: ns401.controldns.mx
rname: root.svgel53.cloud-mx-ns.net
serial: 2024051401
refresh: 3600
retry: 1800
expire: 1209600
minimum-ttl: 86400

Servidor de Correo
host: tresmil400.mx
class: IN
ttl: 3600
type: MX
pri: 20
target: mx40b.anti-spam-premium.com

Servidor de Correo
host: tresmil400.mx
class: IN
ttl: 3600
type: MX
pri: 10
target: mx40a.anti-spam-premium.com

Información TXT
host: tresmil400.mx
class: IN
ttl: 14400
type: TXT
txt: v=spf1 ip4:72.249.57.158 include:relay.mailchannels.net +ip4:67.227.206.84 +ip4:67.227.206.108 +a +mx ~all
entries: Array