How to enable DMARC on your domain
To enable DMARC on your domain add the following TXT record to your domain DNS.
Time to live (TTL): lowest possible
Record type: TXT
Value: v=DMARC1; p=none; rua=mailto:YOUR-CHOSEN-EMAIL@YOURDOMAIN.COM
_(Please use an administrator email address that you choose to receive DMARC reports to.)_
We also recommend using an aggregator to help filter the content of these emails that will be returned. The top reporting aggregators we have found are:
This is based on our experience and based on suggestions from https://dmarc.org/resources/products-and-services/