Registro DMARC
v=DMARC1; p=reject; pct=100; rua=mailto:dmarc-yahoo-rua@yahoo-inc.com;

Servidores DNS Principal (mname) y Secundario (rname)
host: know-legal.com
class: IN
ttl: 1275
type: SOA
mname: hidden-master.yahoo.com
rname: hostmaster.yahoo-inc.com
serial: 2026080501
refresh: 86400
retry: 900
expire: 2592000
minimum-ttl: 300

Información TXT
host: know-legal.com
class: IN
ttl: 1274
type: TXT
txt: bqt1jd6pxxn68pkqz77k7bx8p53fw08k
entries: Array