Checker

DKIM (DomainKeys Identified Mail) is an email authentication method that allows the receiver to verify that an email was actually sent and authorized by the owner of the domain. It adds a digital signature to your emails, which helps prevent spoofing and improves deliverability. Proper DKIM configuration is essential for maintaining good sender reputation.

SPF (Sender Policy Framework) is an email validation system that prevents spammers from sending emails on behalf of your domain. It works by specifying which mail servers are authorized to send emails from your domain. When an email is received, the recipient's server checks the SPF record to verify the sender is legitimate, helping protect your domain from being used in phishing attacks.

DMARC (Domain-based Message Authentication, Reporting, and Conformance) builds on SPF and DKIM by adding policy enforcement and reporting. It tells receiving email servers what to do if an email fails SPF or DKIM checks (quarantine, reject, or allow). DMARC also provides reports on email authentication activity, helping you monitor and improve your email security.

It's recommended to check your email authentication records whenever you make changes to your DNS settings, switch email providers, or notice deliverability issues. As a best practice, perform monthly checks to ensure everything is configured correctly. If you're running important email campaigns, check before launching to avoid deliverability problems.

Yes! Our email authentication checker tools are completely free to use with unlimited checks. We believe everyone should have access to tools that help improve email deliverability and domain security. No registration, credit card, or hidden fees required.

If your records fail validation, our checker tools will provide specific error messages and recommendations for fixing the issues. Common fixes include updating DNS TXT records, correcting syntax errors, or adding missing authentication records. You'll need to access your domain's DNS settings through your hosting provider or domain registrar to make these changes.

DNS propagation typically takes between 1-48 hours, though it can sometimes complete in just a few minutes. The time varies depending on your DNS provider, TTL (Time To Live) settings, and how quickly DNS servers worldwide update their cache. You can use our checker tools to monitor when your changes have fully propagated.

While not strictly required, implementing all three authentication methods (DKIM, SPF, and DMARC) provides the strongest email security and deliverability. Major email providers like Gmail and Yahoo increasingly require these standards. Having all three in place ensures maximum protection against spoofing and the best possible inbox placement rates for your emails.