DKIM Validator

Validate DKIM signatures in email headers to ensure email authenticity and prevent spoofing.

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Total Calculations Run

< 15ms

Browser Execution Speed

100%

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4.9 / 5.0

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About This Tool

This DKIM Validator tool allows you to verify DomainKeys Identified Mail (DKIM) signatures in email headers. DKIM is an email authentication method that uses cryptographic signatures to verify that an email message was sent by an authorized sender and hasn't been tampered with. You can either paste raw email headers directly into the tool or upload .eml files containing complete email messages. The tool extracts DKIM-Signature headers, parses the signature components, and validates them against the sender's domain DNS records. Results show whether the DKIM signature is valid, along with detailed information about the selector, domain, algorithm, and timestamp.

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How to Use

Paste email headers into the text area or upload a .eml file using the file upload option.
Click the 'Validate DKIM' button to start the validation process.
View the results showing DKIM signature status, domain, selector, and other details.
Use the 'Clear' button to reset the form and validate another email.

Frequently Asked Questions

Find Quick Answers

What is DKIM and why is it important?

DKIM (DomainKeys Identified Mail) is an email authentication method that uses cryptographic signatures to verify that an email was sent by an authorized sender and hasn't been altered in transit. It helps prevent email spoofing and phishing attacks.

What information do I need to validate DKIM?

You need the email headers containing the DKIM-Signature field. You can get these by viewing the full headers of an email in your email client or by uploading a complete .eml file.

Can I validate DKIM without uploading files?

Yes, you can paste the raw email headers directly into the text area. The tool will extract and validate any DKIM signatures found in the headers.

What does a 'valid' DKIM signature mean?

A valid DKIM signature means the email was authenticated successfully - the signature matches the sender's domain DNS records and the email content hasn't been modified since it was signed.

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