Free DKIM Record Validator
Verify your DKIM (DomainKeys Identified Mail) configuration and ensure your emails are properly authenticated. Enter your domain and DKIM selector to check if your DNS records are correctly set up.
The selector is found in your email headers under "DKIM-Signature" in the "s=" tag.
How the DKIM Checker Works
Our DKIM validator performs a DNS lookup for your DKIM TXT record and analyzes the configuration for potential issues. What we check:
- DNS record existence at selector._domainkey.yourdomain.com
- DKIM version tag (v=DKIM1)
- Public key validity and length
- Key type (RSA or Ed25519)
- Hash algorithm support (SHA256 recommended)
- Testing mode flags
- Service type restrictions
How to Find Your DKIM Selector
Not sure what your DKIM selector is? Here’s how to find it:
Option 1: Check your email headers
- Send a test email to yourself
- View the email source/headers
- Look for “DKIM-Signature” header
- Find the “s=” tag – this is your selector
Option 2: Use our scanner: Click “Scan for Common Selectors” to automatically check for popular selectors used by major email providers.
Common selectors by provider:
| Provider | Common Selectors |
|---|---|
| Google Workspace | google, selector1, selector2 |
| Microsoft 365 | selector1, selector2 |
| SendGrid | s1, s2 |
| Mailchimp | k1, k2, k3 |
| Amazon SES | amazonses |