Registro DMARC
v=DMARC1; p=reject; rua=mailto:dmarc@nominaal.com

Servidores DNS Principal (mname) y Secundario (rname)
host: nominaal.com
class: IN
ttl: 300
type: SOA
mname: ns1.nominaal.com
rname: postmaster.nominaal.com
serial: 2025111701
refresh: 10800
retry: 3600
expire: 1209600
minimum-ttl: 38400

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