Self-hosting your email? SPF, DKIM and DMARC decide your inbox rate

The author moved their email services from a hosted service to self-hosting using Postfix, aiming to cut costs but quickly encountered deliverability issues when Gmail flagged most emails as spam. The lesson learned was that configuring SPF alone isn't enough; DKIM and DMARC are crucial for ensuring emails reach inboxes rather than spam folders. Understanding these protocols is vital for anyone considering self-hosting email to avoid frustrating deliverability problems, underscoring the importance of technical setup in maintaining effective communication.