Registro DMARC
v=DMARC1; p=quarantine; adkim=s; aspf=s

Servidores DNS Principal (mname) y Secundario (rname)
host: fastcats.org
class: IN
ttl: 1800
type: SOA
mname: lou.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2368935302
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800