Registro DMARC
v=DMARC1; p=reject; rua=mailto:2715b9d9e506427@rep.dmarcanalyzer.com; ruf=mailto:dmarc-reports@shutterstock.com; fo=1; pct=100; rf=afrf

Servidores DNS Principal (mname) y Secundario (rname)
host: shuttered.com
class: IN
ttl: 12031
type: SOA
mname: ns1.markmonitor.com
rname: hostmaster.markmonitor.com
serial: 2023091305
refresh: 86400
retry: 3600
expire: 2592000
minimum-ttl: 172800

Información TXT
host: shuttered.com
class: IN
ttl: 12031
type: TXT
txt: v=spf1 -all
entries: Array