Free DKIM Checker & Lookup

Use our free DKIM record checker to instantly verify whether your domain is properly authenticated

Why DKIM is Important

When DKIM Is Missing or Broken

Emails hit spam
DMARC fails
Deliverability drops
Your domain reputation takes a hit

When DKIM Is Configured Correctly

Build domain trust
Protect your domain from spoofing
Improve inbox placement
Pass DMARC alignment

What is DKIM

DKIM (DomainKeys Identified Mail) is an email authentication method that proves an email was actually sent by your domain and wasn’t modified in transit.

Whether a DKIM record exists
If the DKIM public key is properly formatted
If the selector resolves correctly
Potential issues that can cause DKIM failure

What is a DKIM Selector?

A DKIM selector is a unique label used to locate your DKIM public key in DNS.

Google Workspace → google
Microsoft 365 → selector1, selector2
SendGrid → s1, s2
Mailgun → mg

How the DKIM Record Checker Works

This free tool checks whether your DKIM record is correctly published in DNS.

Enter your domain name
Enter your DKIM selector
We perform a live DNS TXT lookup
You instantly see if the DKIM record is valid

DKIM Check Results Explained

This free tool checks whether your DKIM record is correctly published in DNS.

Valid DKIM Record
DKIM Record Found but Invalid
No DKIM Record Found

Common DKIM Issues

Misconfigured DKIM can hurt deliverability even with good content.

Using the wrong selector
Incomplete DKIM record
Broken or split TXT values
Multiple records with the same selector
DNS changes not fully propagated

DKIM, SPF, and DMARC (Quick Context)

DKIM works best when combined with other email authentication methods.

SPF – verifies sending servers
DMARC – tells inbox providers how to handle authentication failures

Verify your emails with EmailVerify.io to reduce bounces and protect your sender reputation.

FAQs

Frequently Asked Questions

Do I need DKIM to send emails?

Technically no, but practically yes. Most inbox providers expect DKIM.

Can I have multiple DKIM selectors?

Yes. Many providers use multiple selectors for key rotation.

Why does DKIM pass but emails still go to spam?

DKIM authenticates identity, not reputation. List quality and engagement still matter.

Is DKIM enough without SPF or DMARC?

DKIM alone helps, but all three together give best results.

Does this tool store my domain data?

No. All checks are real-time and anonymous.