To enable DMARC, you need to create a DNS TXT record that specifies your DMARC policy.
Login to your DNS hosting provider. Navigate to the DNS management section. Add a new TXT record with the following format: v=DMARC1; p=none; rua=mailto:dmarc-reports@example.com. Replace “example.com” with your domain and update the policy as needed (none, quarantine, or reject). Save the changes.