Registro DMARC
v=DMARC1; p=none; aspf=r; adkim=r;

Servidores DNS Principal (mname) y Secundario (rname)
host: migras.org
class: IN
ttl: 81406
type: SOA
mname: ns1.siteground.net
rname: root.es37.siteground.eu
serial: 2020070464
refresh: 86400
retry: 7200
expire: 3600000
minimum-ttl: 86400

Información TXT
host: migras.org
class: IN
ttl: 9406
type: TXT
txt: v=spf1 +a +mx +a:es37.siteground.eu  include:migras.org.spf.auto.dnssmarthost.net ~all
entries: Array