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Validate DKIM signatures and verify email authentication configuration. Check public key records and ensure proper cryptographic signing setup.
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DKIM (DomainKeys Identified Mail) uses cryptographic signatures to verify email authenticity and prevent tampering during transmission. It's essential for email deliverability and security.
1. Email signing
Mail server signs outgoing messages with private cryptographic key.
2. DNS publication
Public key published in DNS as TXT record with selector.
3. Verification
Receiving servers verify signatures using published public key.
Google Workspace
Uses 'google' selector with 2048-bit RSA keys.
Microsoft 365
Uses 'selector1' and 'selector2' with CNAME records.
Email services
SendGrid, Mailchimp, and others use custom selectors.
A DKIM checker is a tool that validates the DomainKeys Identified Mail (DKIM) record for a specific domain and selector. It ensures that the public key is correctly published in DNS and can be used to verify email signatures.
The DKIM selector is usually provided by your email service provider (e.g., 'google' for Google Workspace, 's1' or 's2' for others). You can also find it in the email headers of a message sent from your domain, looking for the 's=' tag in the DKIM-Signature header.
DKIM adds a digital signature to your emails, allowing receiving servers to verify that the message actually came from your domain and hasn't been altered in transit. This improves email deliverability and protects your brand reputation.
If the check fails, it means the DKIM record is missing, invalid, or the selector is incorrect. Double-check the selector you entered and verify that the DNS record is correctly published in your domain's DNS settings.
InboxKit automatically generates and manages DKIM keys for maximum email security
