Deliverability

SPF, DKIM and DMARC, without the headache

The three records that prove your email is really from you. What each one does, in plain English.

The Sendable team

Published May 21, 2026 · 6 min read

We’re still writing this one. The short version: SPF is a guest list of who can send as you, DKIM is a tamper-proof seal on each message, and DMARC tells receivers what to do when something fails both.

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