DKIM Record Checker
Verify DomainKeys Identified Mail (DKIM) signatures. Ensure your emails are authenticated and prevent spoofing.
DKIM Record Verification: A Developer's Guide
DomainKeys Identified Mail (DKIM) is an email authentication protocol that adds a cryptographic digital signature to email headers. This signature proves that the message was sent by the authorized domain owner and guarantees that the email body copy and headers were not modified in transit.
To verify DKIM signatures, recipient servers lookup a public key published as a TXT record in your DNS zone. Our DKIM Checker queries your DNS records for a specific selector prefix and validates the cryptographic key format, helping you resolve signature bouncestamps and configuration errors.
Frequently Asked Questions
What is a DKIM selector?
A selector is an arbitrary string used to identify a specific DKIM record in your DNS. It allows you to publish multiple DKIM keys for different mail servers (e.g. Google Workspace uses 'google').
How do I find my DKIM selector?
Check your email provider's admin console, or inspect the headers of a sent email for the 's=' tag in the 'DKIM-Signature' header.
Why is my DKIM verification failing?
Common causes include copy-paste typos in the DNS TXT key value, missing selector names, or misconfigured mail server signing configurations.
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