DNS records are vital for email authentication. Here's a brief overview of the primary records:
SPF (Sender Policy Framework): Publish an SPF record in your DNS to specify which IP addresses are authorized to send emails on behalf of your domain. DKIM (DomainKeys Identified Mail): Add a DKIM record to sign your emails with a cryptographic signature, ensuring email integrity and authenticity. DMARC (Domain-based Message Authentication, Reporting & Conformance): Implement a DMARC record to define how recipient mail servers should handle emails that fail SPF or DKIM checks.