Registro DMARC
v=DMARC1; p=none; rua=mailto:postmaster@hzscr.cz ; ruf=mailto:postmaster@hzscr.cz ; fo=1; adkim=s; aspf=s

Servidores DNS Principal (mname) y Secundario (rname)
host: izscr.cz
class: IN
ttl: 21600
type: SOA
mname: nsas.coprosys.cz
rname: hostmaster.coprosys.cz
serial: 2015072100
refresh: 86400
retry: 3600
expire: 604800
minimum-ttl: 360

Servidor de Correo
host: izscr.cz
class: IN
ttl: 21600
type: MX
pri: 10
target: sumec1.hzscr.cz

Servidor de Correo
host: izscr.cz
class: IN
ttl: 21600
type: MX
pri: 10
target: sumec2.hzscr.cz

Información TXT
host: izscr.cz
class: IN
ttl: 50026
type: TXT
txt: v=spf1 mx -all
entries: Array