Email authentication is a must for ensuring your emails aren’t treated as impostors, serving as another vital email delivery factor. Think of it like adding security tags to your messages. For instance, SPF (Sender Policy Framework) tells servers you’re legit. Transitioning to DKIM (DomainKeys Identified Mail), it signs your emails, verifying they’re really from you. Lastly, DMARC (Domain-based Message Authentication, Reporting, and Conformance) ties it all together. In summary, this all ensures the prevention of email spoofing and phishing attacks.