Free DKIM Checker Tool
Free DKIM Record Checker Tool
Verify your DKIM configuration is working correctly. Use the tool below to look up your DKIM record and validate your email signature setup.
Check Your DKIM Record
To check a DKIM record, you need two things:
- Your domain name (e.g., yourdomain.com)
- The DKIM selector (e.g., google, selector1, k1)
Common DKIM Selectors by Service
Not sure what selector to use? Here are common selectors for popular services:
| Service | Selector(s) |
|---|---|
| Google Workspace | google |
| Microsoft 365 |
selector1, selector2
|
| Mailchimp | k1 |
| SendGrid |
s1, s2
|
| HubSpot |
hs1, hs2
|
| Amazon SES | Random string (check your SES console) |
| Klaviyo |
kl, kl2
|
Understanding Your Results
Healthy DKIM Record
A valid DKIM record shows:
- ✅ Record found at the selector location
- ✅ Valid public key present
- ✅ Key size of 1024-bit or 2048-bit (2048 recommended)
- ✅ No syntax errors
Common Issues
| Issue | Cause | Solution |
|---|---|---|
| No record found | Wrong selector or DKIM not set up | Verify selector name, check service settings |
| Invalid key | Malformed public key | Regenerate and republish key |
| 512-bit key | Deprecated key size | Upgrade to 2048-bit key |
How to Find Your DKIM Selector
Method 1: Check Email Headers
- Send yourself an email from the service
- View the email headers/source
- Look for
DKIM-Signature:header - Find the
s=parameter - that's your selector
Method 2: Check Your Service's Documentation
Most email services document their DKIM selector in their setup guides.