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

Servidores DNS Principal (mname) y Secundario (rname)
host: staticflickr.com
class: IN
ttl: 900
type: SOA
mname: ns-1769.awsdns-29.co.uk
rname: awsdns-hostmaster.amazon.com
serial: 1
refresh: 7200
retry: 900
expire: 1209600
minimum-ttl: 86400