Email Authentication Guides
Comprehensive guides to help you understand, set up, and maintain email authentication for your domains. From DMARC basics to meeting Google and Yahoo compliance requirements.
What is DMARC?
Complete guide to Domain-based Message Authentication, Reporting & Conformance. Learn how DMARC protects your domain from email spoofing.
Read guideSPF vs DKIM vs DMARC Explained
How the three email authentication protocols work together to protect your domain and improve deliverability.
Read guideGoogle & Yahoo DMARC Requirements
Complete compliance guide for bulk sender email authentication mandates from Google and Yahoo, effective since February 2024.
Read guideHow to Set Up DMARC Step-by-Step
Implementation guide from monitoring (p=none) to full enforcement (p=reject). Includes DNS record examples.
Read guideDMARC Setup Guides by Provider
Provider-specific SPF, DKIM, and DMARC setup guides for Google Workspace, Microsoft 365, Mailchimp, SendGrid, Amazon SES, and more.
Read guideHave Questions?
Check our frequently asked questions for quick answers about email authentication, compliance scoring, and how Inbox Insignia works.
Visit FAQNeed Continuous Monitoring?
Understanding email authentication is the first step. Let Inbox Insignia handle the ongoing monitoring with automated scanning, drift detection, compliance scoring, and instant alerts when something changes.