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DKIM Checker - Verify Your Emails with Ease

Guarantee Your Email Security and Trustworthiness with Our Free DKIM Checker

How it Works

What is a DKIM Record?

A DKIM record is a TXT-format DNS entry containing the selector and the public key used for email authentication. The selector identifies the specific private key used to sign the email message, while the public key is used to verify the signature of the email message.

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Still have a questions ?

What is DKIM?

DKIM (DomainKeys Identified Mail) is an email authentication method that allows the sender to verify the authenticity of their email message. It uses a digital signature linked to the sender’s domain, helping recipients confirm the email’s origin and integrity.

How does DKIM work?

DKIM works by adding a digital signature to the header of an email. This signature is created using a private key on the sender’s mail server. The recipient’s mail server then checks this signature using the sender’s public key (published in the DNS) to confirm that the email is authentic and hasn’t been tampered with.

What happens if my DKIM fails?

If your DKIM check fails, it can indicate that the email has been tampered with or that the signature does not match the sender’s domain. In some cases, it may lead to your email being marked as spam or rejected by the recipient’s mail server. It’s important to troubleshoot the issue, typically by ensuring proper DNS configurations and correct DKIM signing.

What is the difference between DKIM, SPF, and DMARC?

DKIM: Verifies that the email content is authentic and hasn’t been altered in transit.
SPF: Checks that the sender’s IP address is authorized to send emails for a given domain.
DMARC: Builds on DKIM and SPF to provide policy enforcement, telling receiving mail servers how to handle emails that fail authentication.

How long does it take for DKIM changes to take effect?

Once you update your DNS records with a DKIM key, it can take anywhere from a few minutes to 72 hours for the changes to propagate across the internet. Be patient and verify the changes once they’ve had time to take effect.