- SPF (Sender Policy Framework): This TXT record specifies which mail servers are allowed to send emails on behalf of your domain. Configuring an SPF record helps in preventing email spoofing. - DKIM (DomainKeys Identified Mail): This TXT record adds a digital signature to your emails, enabling the recipient's server to verify that the email was indeed sent by your domain. Configuring DKIM improves your email's credibility. - DMARC (Domain-based Message Authentication, Reporting & Conformance): This TXT record works in conjunction with SPF and DKIM to provide a way for domain owners to specify how unauthenticated mail should be handled. It also generates reports for the domain owner.