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

Servidores DNS Principal (mname) y Secundario (rname)
host: overlakemedicalclinics.net
class: IN
ttl: 7200
type: SOA
mname: NS39.WORLDNIC.COM
rname: namehost.WORLDNIC.COM
serial: 126072819
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 3600

Información TXT
host: overlakemedicalclinics.net
class: IN
ttl: 14400
type: TXT
txt: v=spf1 -all
entries: Array