Stopping Our Emails from Going to Spam

Concept: Passing the strict authentication checks required by modern spam filters to achieve inbox placement.

The Three Pillars:

• SPF: Authorizes the sending IP.
• DKIM: Applies a cryptographic signature to the payload.
• DMARC: Instructs receiving servers on handling failures.
• The Linchpin: A Custom MAIL FROM must be configured on the relay server to ensure the technical sender matches the visible domain authorized in Configuring Cloudflare DNS Records, achieving full SPF Alignment.