Registro DMARC
v=DMARC1; p=reject; sp=none; aspf=s; adkim=s

Servidores DNS Principal (mname) y Secundario (rname)
host: isohair.us
class: IN
ttl: 21600
type: SOA
mname: udns1.cscdns.net
rname: hostmaster.cscdns.net
serial: 2021030802
refresh: 86400
retry: 86400
expire: 86400
minimum-ttl: 86400

Servidor de Correo
host: isohair.us
class: IN
ttl: 21600
type: MX
pri: 0
target: 

Información TXT
host: isohair.us
class: IN
ttl: 21600
type: TXT
txt: v=spf1 -all
entries: Array