Configuring DMARC

DMARC standardizes how email receivers perform email authentication using both of the well-known SPF and DKIM mechanisms. It is highly recommended to configure DMARC so that you have better control over the verification of emails originating from your domain. You can check the DMARC configuration of your domain using a service like dmarcian (https://dmarcian.com/dmarc-inspector/).

For more detail on DMARC, please refer to the DMARC specification or other publicly available documentation on the topic (https://tools.ietf.org/html/rfc7489).