SPF (Sender Policy Framework) SPF allows the domain owner to specify which mail servers are permitted to send email on behalf of their domain. Implementing SPF reduces the risk of email spoofing.
DKIM (DomainKeys Identified Mail) DKIM adds a digital signature to your emails, allowing recipients to verify that the emails are indeed from your domain and have not been tampered with during transit.
DMARC (Domain-based Message Authentication, Reporting & Conformance) DMARC builds upon SPF and DKIM by providing a framework for email receivers to report back to the domain owner about any suspicious email activities. It helps in monitoring and enforcing email authentication policies.