{"id":3924,"date":"2024-07-29T08:07:52","date_gmt":"2024-07-29T08:07:52","guid":{"rendered":"https:\/\/www.warmy.io\/blog\/klaviyo-spf-dkim-dmarc-setup-guide\/"},"modified":"2026-06-10T08:28:33","modified_gmt":"2026-06-10T08:28:33","slug":"klaviyo-spf-dkim-dmarc-setup-guide","status":"publish","type":"post","link":"https:\/\/www.warmy.io\/blog\/klaviyo-spf-dkim-dmarc-setup-guide\/","title":{"rendered":"Complete Guide to SPF, DKIM, and DMARC Setup in Klaviyo"},"content":{"rendered":"\n

If you send email marketing through Klaviyo, authentication is no longer optional. Starting in February 2024, Google and Yahoo required all bulk senders<\/a> to authenticate with both SPF and DKIM and publish a DMARC record with a minimum policy of p=none. Google defines a bulk sender as anyone sending 5,000 or more emails per day to Gmail recipients. In May 2025, Microsoft extended the same requirements<\/a> to Outlook, Hotmail, and Live addresses.<\/p>\n\n\n\n

The consequences are direct: non-compliant emails are rejected or sent permanently to spam. If you run Klaviyo campaigns without proper authentication, your messages may never reach the inbox.<\/p>\n\n\n\n

Beyond authentication, Google, Yahoo, and Microsoft also require one-click unsubscribe for bulk senders. Klaviyo handles this automatically for all email campaigns.<\/p>\n\n\n

What Are SPF, DKIM, and DMARC?<\/h2>\n

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SPF (Sender Policy Framework)<\/strong> is a DNS record that tells receiving mail servers which IP addresses and services are authorized to send email on behalf of your domain. It stops spammers from forging your domain in the “From” address by giving receivers a verified list of approved senders. Learn more about how SPF records work<\/a>.<\/p>\n

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DKIM (DomainKeys Identified Mail)<\/strong> attaches a cryptographic digital signature to every outgoing email. The receiving server checks this signature against a public key stored in your DNS records. If the signature matches, the message is confirmed as unmodified and from an authorized sender. DKIM protects the integrity of your email content from the moment it leaves your server to the moment it is received.<\/p>\n

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DMARC (Domain-based Message Authentication, Reporting, and Conformance)<\/strong> builds on SPF and DKIM. It lets you tell receiving servers what to do with emails that fail authentication \u2014 ignore failures (p=none), send them to spam (p=quarantine), or reject them outright (p=reject). DMARC also generates reports so you can monitor authentication failures and detect spoofing attempts against your domain.<\/p>\n

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Why Setting Up SPF, DKIM, and DMARC Is Necessary<\/h2>\n

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Properly configured authentication is the foundation of email deliverability. Without it, your Klaviyo campaigns face a significantly higher risk of landing in spam or being rejected entirely.\u00a0<\/p>\n

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Here are the core benefits of setting up SPF, DKIM, and DMARC:<\/p>\n

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