Registro DMARC
v=spf1 a mx ip4:89.221.213.102 ip4:89.221.213.101 ip4:185.82.213.38 ip4:77.78.104.0/24 ip4:185.28.192.0/22 ip4:185.28.193.0/24 include:_spf.we.wedos.net include:spf.seznam.cz ~all

Registro IPv4
host: er.cz
class: IN
ttl: 300
type: A
ip: 89.221.213.102

Servidores DNS Principal (mname) y Secundario (rname)
host: er.cz
class: IN
ttl: 1800
type: SOA
mname: leo.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2354919556
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800

Servidor de Correo
host: er.cz
class: IN
ttl: 300
type: MX
pri: 20
target: d1f74436139ae32d.mx1.emailprofi.seznam.cz

Servidor de Correo
host: er.cz
class: IN
ttl: 300
type: MX
pri: 10
target: d1f74436139ae32d.mx2.emailprofi.seznam.cz

Información TXT
host: er.cz
class: IN
ttl: 300
type: TXT
txt: v=spf1 a mx ip4:89.221.213.102 ip4:89.221.213.101 ip4:185.82.213.38 ip4:77.78.104.0/24 ip4:185.28.192.0/22 ip4:185.28.193.0/24 include:_spf.we.wedos.net include:spf.seznam.cz ~all
entries: Array