Registro DMARC
v=DMARC1; p=reject; pct=100; sp=reject

Servidores DNS Principal (mname) y Secundario (rname)
host: rmstafford.com
class: IN
ttl: 21600
type: SOA
mname: ns1.terracon.com
rname: netnotify.terracon.com
serial: 2023062900
refresh: 10800
retry: 3600
expire: 1209600
minimum-ttl: 86400

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