Registro DMARC
v=DMARC1; p=reject; aspf=s

Servidores DNS Principal (mname) y Secundario (rname)
host: schoolnet.by
class: IN
ttl: 3600
type: SOA
mname: a1.domain.by
rname: info.domain.by
serial: 2022060401
refresh: 43200
retry: 7200
expire: 2419200
minimum-ttl: 11200

Servidor de Correo
host: schoolnet.by
class: IN
ttl: 3600
type: MX
pri: 10
target: mg.g-cloud.by

Servidor de Correo
host: schoolnet.by
class: IN
ttl: 3600
type: MX
pri: 20
target: ms1.g-cloud.by

Información TXT
host: schoolnet.by
class: IN
ttl: 3600
type: TXT
txt: v=spf1 include:_spf.g-cloud.by +a +mx -all
entries: Array