Registro DMARC
v=DMARC1; p=reject; pct=100; aspf=r; adkim=r

Registro IPv4
host: expres.cz
class: IN
ttl: 34
type: A
ip: 185.17.117.33

Servidores DNS Principal (mname) y Secundario (rname)
host: expres.cz
class: IN
ttl: 300
type: SOA
mname: ns.mafra.cz
rname: hostmaster.mafra.cz
serial: 2025050600
refresh: 28800
retry: 7200
expire: 604800
minimum-ttl: 300

Servidor de Correo
host: expres.cz
class: IN
ttl: 1200
type: MX
pri: 20
target: smtp3.mafra.cz

Servidor de Correo
host: expres.cz
class: IN
ttl: 1200
type: MX
pri: 20
target: smtp4.mafra.cz

Servidor de Correo
host: expres.cz
class: IN
ttl: 1200
type: MX
pri: 10
target: smtp2.mafra.cz

Servidor de Correo
host: expres.cz
class: IN
ttl: 1200
type: MX
pri: 10
target: smtp1.mafra.cz