Registro DMARC
v=DMARC1; p=reject; fo=1; rua=mailto:dmarc_agg@vali.email

Servidores DNS Principal (mname) y Secundario (rname)
host: williscm.com
class: IN
ttl: 21600
type: SOA
mname: ha1.markmonitor.zone
rname: hostmaster.markmonitor.com
serial: 2024110101
refresh: 86400
retry: 3600
expire: 2592000
minimum-ttl: 172800

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