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: redheadbonedry.us
class: IN
ttl: 300
type: SOA
mname: dns1.ipmanagerinc.net
rname: tech.brandshelter.com
serial: 2023120600
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 300