Registro DMARC
v=DMARC1; p=none

Servidores DNS Principal (mname) y Secundario (rname)
host: open-i.com
class: IN
ttl: 86400
type: SOA
mname: fusilla.abanet.it
rname: postmaster.open-i.com
serial: 2024030601
refresh: 86400
retry: 3600
expire: 604800
minimum-ttl: 86400

Servidor de Correo
host: open-i.com
class: IN
ttl: 86400
type: MX
pri: 10
target: relay5.abanet.it

Servidor de Correo
host: open-i.com
class: IN
ttl: 86400
type: MX
pri: 20
target: relay.abanet.it

Información TXT
host: open-i.com
class: IN
ttl: 86400
type: TXT
txt: v=spf1 mx a ip4:212.28.160.0/25 ~all
entries: Array