Registro DMARC
v=DMARC1; p=reject; rua=mailto:postmaster@critsend.com; adkim=r; aspf=r; sp=none

Registro IPv4
host: critsend.com
class: IN
ttl: 300
type: A
ip: 51.15.174.21

Servidores DNS Principal (mname) y Secundario (rname)
host: critsend.com
class: IN
ttl: 1800
type: SOA
mname: roxy.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2351293550
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800

Servidor de Correo
host: critsend.com
class: IN
ttl: 300
type: MX
pri: 10
target: smtp-a.critsend.com

Servidor de Correo
host: critsend.com
class: IN
ttl: 300
type: MX
pri: 20
target: smtp-d.critsend.com

Servidor de Correo
host: critsend.com
class: IN
ttl: 300
type: MX
pri: 20
target: smtp-b.critsend.com

Información TXT
host: critsend.com
class: IN
ttl: 300
type: TXT
txt: mailru: 608460ef005f4878
entries: Array

Información TXT
host: critsend.com
class: IN
ttl: 300
type: TXT
txt: v=spf1 mx include:messaging-master.com ip4:163.172.244.178 ip4:51.15.151.137 ip4:51.15.152.189 ip4:51.15.153.171 ip4:62.210.124.97 ip4:51.158.84.0/27 ip4:163.172.244.189 ip4:163.172.75.223 ip4:62.210.52.225 ip4:212.129.21.35 ip4:51.159.71.243 ~all
entries: Array