While both SPF and DKIM are authentication methods for email, they serve different purposes. SPF (Sender Policy Framework) focuses on verifying that the email is sent from an authorized server for your domain, ensuring that only designated IP addresses can send emails. On the other hand, DKIM (DomainKeys Identified Mail) adds a digital signature to your emails, allowing recipients to confirm that the message hasn’t been altered during transit and that it genuinely comes from your domain.