Registro DMARC
v=spf1 include:spf.protection.outlook.com -all

Registro IPv4
host: smsm-it.com
class: IN
ttl: 300
type: A
ip: 185.70.250.58

Servidores DNS Principal (mname) y Secundario (rname)
host: smsm-it.com
class: IN
ttl: 303
type: SOA
mname: desiree.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2402102108
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800

Servidor de Correo
host: smsm-it.com
class: IN
ttl: 300
type: MX
pri: 0
target: smsmit-com01b.mail.protection.outlook.com

Información TXT
host: smsm-it.com
class: IN
ttl: 300
type: TXT
txt: v=spf1 include:spf.protection.outlook.com -all
entries: Array