Registro DMARC
v=spf1 mx a include:smtp-gw.gigaserver.cz ~all

Registro IPv4
host: sistour.cz
class: IN
ttl: 3600
type: A
ip: 185.66.36.2

Servidores DNS Principal (mname) y Secundario (rname)
host: sistour.cz
class: IN
ttl: 1800
type: SOA
mname: 1.ns.gigaserver.cz
rname: dns.gigaserver.cz
serial: 1545516395
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 3600

Servidor de Correo
host: sistour.cz
class: IN
ttl: 3600
type: MX
pri: 50
target: mail.gigaserver.cz

Información TXT
host: sistour.cz
class: IN
ttl: 3600
type: TXT
txt: v=spf1 mx a include:smtp-gw.gigaserver.cz ~all
entries: Array