Registro DMARC
v=DMARC1; p=quarantine; adkim=r; aspf=s

Registro IPv4
host: duha.cz
class: IN
ttl: 300
type: A
ip: 176.227.168.61

Servidores DNS Principal (mname) y Secundario (rname)
host: duha.cz
class: IN
ttl: 300
type: SOA
mname: ns1.one.cz
rname: one.one.cz
serial: 2026100141
refresh: 43200
retry: 14400
expire: 1209600
minimum-ttl: 10800

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

Información TXT
host: duha.cz
class: IN
ttl: 300
type: TXT
txt: v=spf1 a mx include:_spfc.hostingsolutions.cz -all
entries: v=spf1 a mx include:_spfc.hostingsolutions.cz -all