What is DKIM?
DKIM (DomainKeys Identified Mail) is an email-authentication method that adds a cryptographic signature to every message you send. The receiving server uses a public key published in your DNS to verify the message genuinely came from your domain and wasn’t tampered with in transit — strengthening trust and deliverability.
How does DKIM work?
Your sending server signs each message with a private key; the matching public key lives in your DNS. Receivers check the signature to confirm authenticity and integrity. DKIM pairs with SPF and is required for DMARC alignment. The deliverability checker confirms whether your DKIM record is published.
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SPF (Sender Policy Framework)
SPF (Sender Policy Framework) is a DNS record that specifies which mail servers are authorized to send email on behalf o…
DMARC
DMARC (Domain-based Message Authentication, Reporting & Conformance) is a DNS policy that builds on SPF and DKIM. It tel…
Email Deliverability
Email deliverability is the measure of whether your emails actually reach recipients’ primary inboxes rather than the sp…
Questions
DKIM — FAQ
What’s the difference between SPF and DKIM?
SPF authorizes which servers may send for your domain; DKIM cryptographically proves the message wasn’t altered and came from you. DMARC ties them together.
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