Free Tool

DKIM Record Checker

Enter your domain and DKIM selector to verify your public key is correctly published in DNS. DKIM signs your emails so receivers know they haven't been tampered with.

Not sure of your selector? Try common ones for your email provider:

google (Google Workspace) s1 (many ESPs) s2 k1 (Mailchimp) mail dkim smtp (Brevo) selector1 (Microsoft 365) selector2 (Microsoft 365) protonmail3 pm (Postmark)
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Frequently Asked Questions

What is DKIM?

DKIM (DomainKeys Identified Mail) is an email authentication method that uses a digital signature to verify that an email was sent from an authorized server and was not altered in transit.

How do I find my DKIM selector?

The DKIM selector is specified in the email header under 's=' tag. Common selectors include 'google', 'mail', 'default', or custom names set by your email provider.

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