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

Servidores DNS Principal (mname) y Secundario (rname)
host: aolsearch.com
class: IN
ttl: 900
type: SOA
mname: ns-596.awsdns-10.net
rname: awsdns-hostmaster.amazon.com
serial: 1
refresh: 7200
retry: 900
expire: 1209600
minimum-ttl: 86400