Registro DMARC
v=DMARC1; p=none; rua=mailto:postmaster@isc888.xyz; ruf=mailto:postmaster@isc888.xyz; fo=1

Servidores DNS Principal (mname) y Secundario (rname)
host: isc888.xyz
class: IN
ttl: 3601
type: SOA
mname: dns1.registrar-servers.com
rname: hostmaster.registrar-servers.com
serial: 1748656117
refresh: 43200
retry: 3600
expire: 604800
minimum-ttl: 3601

Información TXT
host: isc888.xyz
class: IN
ttl: 90
type: TXT
txt: v=spf1 ip4:198.58.111.57 -all
entries: Array