The CleanMarc blog

Notes on DMARC, SPF, and DKIM authentication, deliverability, and keeping your sending domains clean.

July 21, 2026 · The CleanMarc Team

DMARC, DKIM, SPF Oh My! - The what and why of email sender authentication

To be an upstanding email sender you would ideally have DMARC, DKIM, and SPF configured properly for your sending domain, but what are they and why do we need them in the first place?

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