Email Authentication Guides

Step-by-step SPF, DKIM, DMARC, and List-Unsubscribe setup for the providers people actually use. Pick yours below, follow the guide, then verify with a free scan.

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Google Workspace

Gmail and Google Workspace SPF, DKIM, and DMARC via the Admin console.

SPF · DKIM · DMARC · List-Unsubscribe

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Microsoft 365

Exchange Online SPF, CNAME-based DKIM, and DMARC via the Defender portal.

SPF · DKIM · DMARC · List-Unsubscribe

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SendGrid

SendGrid CNAME-based domain authentication, DMARC alignment, and List-Unsubscribe.

SPF · DKIM · DMARC · List-Unsubscribe

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Mailgun

Mailgun domain DNS records for SPF, DKIM, DMARC, and sending reputation.

SPF · DKIM · DMARC · List-Unsubscribe

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Brevo

Brevo domain authentication: SPF, DKIM, and DMARC from the Senders settings.

SPF · DKIM · DMARC · List-Unsubscribe

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Shopify

Shopify Email custom sender domain: SPF, DKIM, and DMARC at your DNS provider.

SPF · DKIM · DMARC · List-Unsubscribe

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Namecheap

Add SPF, DKIM, and DMARC records in Namecheap Advanced DNS for any email provider.

SPF · DKIM · DMARC · List-Unsubscribe

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Cloudflare

Publish SPF, DKIM, and DMARC TXT records in Cloudflare DNS correctly.

SPF · DKIM · DMARC · List-Unsubscribe

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Zoho Mail

Zoho Mail Email Authentication: SPF, DKIM, and DMARC via the admin console.

SPF · DKIM · DMARC · List-Unsubscribe

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GoDaddy

Add SPF, DKIM, and DMARC DNS records through GoDaddy's DNS manager.

SPF · DKIM · DMARC · List-Unsubscribe

Not sure where to start? Run a free check on your domain to see which records are missing or broken.