To set up these protocols, you'll need to add specific DNS records to your domain's DNS settings.
SPF: Add a TXT record specifying the servers authorized to send emails for your domain. DKIM: Generate a public-private key pair and add the public key as a TXT record in your DNS settings. DMARC: Add a TXT record specifying the policy for handling emails that fail SPF or DKIM checks.
Most Email Service Providers (ESPs) offer detailed guides and tools to help you set up these records.