Registro DMARC
v=DMARC1;p=reject;pct=100;rua=mailto:dmarc-groups@hubspot.com;ruf=mailto:dmarc-groups@hubspot.com

Servidores DNS Principal (mname) y Secundario (rname)
host: senaluno.com
class: IN
ttl: 1287
type: SOA
mname: adi.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2420077470
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800

Información TXT
host: senaluno.com
class: IN
ttl: 300
type: TXT
txt: v=spf1 -all
entries: v=spf1 -all