Registro DMARC
v=DMARC1; p=none; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com

Servidores DNS Principal (mname) y Secundario (rname)
host: Cosmoprofcatalog.com
class: IN
ttl: 300
type: SOA
mname: ns1.p68.dns.oraclecloud.net
rname: hostmaster.Cosmoprofcatalog.com
serial: 3
refresh: 3600
retry: 600
expire: 604800
minimum-ttl: 1800