DKIM Record Checker
Validate your domain's DKIM record and cryptographic signature setup.
What is DKIM?
DKIM (DomainKeys Identified Mail) adds a cryptographic signature to your emails, proving they haven't been tampered with.
How It Works
Your server signs outgoing emails with a private key. Receivers verify the signature using your public key published in DNS.
Key Length
Use at least 2048-bit RSA keys. 1024-bit keys are considered weak and may not pass security checks.
Multiple Selectors
You can have multiple DKIM selectors for different services (e.g. google for Gmail, s1 for a marketing tool).