Dev Tools · 1h ago
Self-Hosting Email? SPF, DKIM, DMARC Are Your Inbox Gatekeepers
Self-hosting email requires more than just setting up Postfix; deliverability hinges on SPF, DKIM, and DMARC records. SPF authorizes sending IPs, DKIM cryptographically signs messages, and DMARC aligns them with the visible From address. A single typo in DNS can silently break authentication, causing emails to land in spam.
Meridian48 take
The article is a practical guide for developers, but it understates the behavioral trust factor—even perfect authentication won't guarantee inbox placement without a positive sending reputation.
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Self-hosting your email? SPF, DKIM and DMARC decide your inbox rate →
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