DKIM Checker: Verify DomainKeys Identified Mail Signatures

DKIM (DomainKeys Identified Mail) is an email authentication method that uses cryptographic signatures to verify that an email message was sent by an authorized mail server and hasn't been tampered with during transit. Our DKIM Checker tool helps you verify DKIM record configuration, check signature validity, and troubleshoot authentication issues. Proper DKIM setup is essential for email security, deliverability, and building trust with email providers. This tool is perfect for email administrators, security teams, and businesses that need to ensure their email communications are properly authenticated.

How it works

1. Enter your domain name and selector (the DKIM selector used by your email system, often "default" or "mail").
2. Our tool queries your DNS for the DKIM public key record, which is stored as a TXT record in the format: selector._domainkey.yourdomain.com.
3. The DKIM record is parsed and validated, checking for proper format, key type, and key length.
4. The tool analyzes the public key and provides information about key strength, algorithm used, and record completeness.
5. Results include validation status, key details, and recommendations for proper DKIM configuration.

Why it matters

• Enhance email security by ensuring your emails are cryptographically signed and can be verified by recipients.
• Improve email deliverability as email providers trust DKIM-signed emails more than unsigned ones.
• Protect against email tampering by enabling recipients to verify that emails haven't been modified in transit.
• Build domain reputation by consistently signing emails, which helps establish trust with email providers.
• Comply with email authentication standards that are increasingly required for reliable email delivery.

FAQ

What is a DKIM selector?

A DKIM selector is a string that identifies which public key to use for verification. It allows you to have multiple DKIM keys for different purposes (e.g., marketing emails vs. transactional emails).

How do I find my DKIM selector?

The DKIM selector is typically configured in your email service provider's settings. Common selectors include "default", "mail", "google", or custom names. Check your email provider's documentation or admin panel.

Can I have multiple DKIM records?

Yes, you can have multiple DKIM records with different selectors. This allows you to use different keys for different email services or purposes.

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