How do I implement DMARC for my domain?

To implement DMARC for your domain, you will need to create a DMARC record and publish it in the DNS. The DMARC record specifies the mechanisms used for email authentication, as well as the policies for how to handle messages that fail authentication. Once the DMARC record is published, email servers can use it to verify the authenticity of emails that claim to be from your domain.