Registro DMARC
v=DMARC1; p=reject; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com

Servidores DNS Principal (mname) y Secundario (rname)
host: naturalconnection.com
class: IN
ttl: 3600
type: SOA
mname: ns1.a0.impervasecuredns.net
rname: domain.master.unfi.com
serial: 5
refresh: 3600
retry: 600
expire: 604800
minimum-ttl: 900