Registro DMARC
v=spf1 a mx ~all

Registro IPv4
host: gbl.edu.pl
class: IN
ttl: 3600
type: A
ip: 89.161.215.64

Servidores DNS Principal (mname) y Secundario (rname)
host: gbl.edu.pl
class: IN
ttl: 3600
type: SOA
mname: dns.home.pl
rname: admin.home.pl
serial: 1566893708
refresh: 14400
retry: 7200
expire: 2419200
minimum-ttl: 3600

Servidor de Correo
host: gbl.edu.pl
class: IN
ttl: 3600
type: MX
pri: 10
target: gbl.edu.pl

Información TXT
host: gbl.edu.pl
class: IN
ttl: 3600
type: TXT
txt: v=spf1 a mx ~all
entries: Array