DNS records directly impact email deliverability by authenticating the sender's identity. Here's how:
SPF (Sender Policy Framework): This record specifies which IP addresses are allowed to send emails on behalf of your domain. DKIM (DomainKeys Identified Mail): DKIM adds a digital signature to your emails, verifying that they haven’t been altered in transit. DMARC (Domain-based Message Authentication, Reporting & Conformance): This record uses SPF and DKIM to determine how to handle emails that fail authentication checks.