SPF (Sender Policy Framework): This record specifies which mail servers are authorized to send emails on behalf of your domain. DKIM (DomainKeys Identified Mail): This record adds a digital signature to your emails, which helps verify that the email has not been altered in transit. DMARC (Domain-based Message Authentication, Reporting & Conformance): This record works with SPF and DKIM to provide instructions on how to handle emails that fail authentication checks. MX (Mail Exchange): This record directs where emails sent to your domain should be delivered.