Free DKIM Record Lookup

DKIM (DomainKeys Identified Mail) is a critical email authentication protocol that uses public-key cryptography to verify that an email message was sent by the domain it claims to be from, and that the message content hasn't been tampered with during transit. When a mail server sends an email, it creates a digital signature using a private key. The recipient's mail server then looks up the sender's public key in DNS and uses it to verify the signature.

Properly configured DKIM records are essential for email deliverability. Major email providers like Gmail, Outlook, and Yahoo use DKIM verification as a key factor in spam filtering decisions. Without valid DKIM signing, your emails are more likely to land in the spam folder or be rejected entirely. Combined with SPF records and DMARC policies, DKIM forms the foundation of modern email authentication.

Use this free DKIM lookup tool to verify your domain's DKIM configuration. You can check the public key, key length, hash algorithms, and other tags. For a comprehensive check of all your DNS records, try our full DNS lookup tool.