Registro DMARC
v=DMARC1; p=reject; rua=mailto:mailstat@hd21.com

Registro IPv4
host: hd21.com
class: IN
ttl: 300
type: A
ip: 78.140.182.225

Registro IPv4
host: hd21.com
class: IN
ttl: 300
type: A
ip: 78.140.182.241

Servidores DNS Principal (mname) y Secundario (rname)
host: hd21.com
class: IN
ttl: 1800
type: SOA
mname: bart.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2357775267
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800

Servidor de Correo
host: hd21.com
class: IN
ttl: 300
type: MX
pri: 10
target: mail.hd21.com

Información TXT
host: hd21.com
class: IN
ttl: 300
type: TXT
txt: v=spf1 ip4:188.72.216.58 -all
entries: Array