Registro DMARC
v=DMARC1; p=reject;

Registro IPv4
host: summitd.cz
class: IN
ttl: 900
type: A
ip: 81.91.86.11

Servidores DNS Principal (mname) y Secundario (rname)
host: summitd.cz
class: IN
ttl: 900
type: SOA
mname: ns.web4u.cz
rname: admin.web4u.cz
serial: 2025050200
refresh: 10800
retry: 3600
expire: 1209600
minimum-ttl: 14400

Servidor de Correo
host: summitd.cz
class: IN
ttl: 900
type: MX
pri: 10
target: mx1.mailchannels.net

Servidor de Correo
host: summitd.cz
class: IN
ttl: 900
type: MX
pri: 10
target: mx2.mailchannels.net

Información TXT
host: summitd.cz
class: IN
ttl: 900
type: TXT
txt: v=spf1 include:_spf.web4u.cz ~all
entries: Array