DKIM Record Checker
Look up your DKIM record across 18 common selectors. Validate key strength, check configuration, and verify your email signing setup.
What is DKIM?
DKIM (DomainKeys Identified Mail) adds a cryptographic signature to your outgoing emails. The receiving server uses a public key published in your DNS to verify that the email was not altered in transit and that it was authorized by the domain owner.
Unlike SPF which validates the sending server, DKIM validates the message content itself. This makes it a critical layer of email authentication that Gmail, Outlook, and Yahoo use to determine whether to deliver your emails to the inbox.
Key strength matters
DKIM keys should be at least 2048 bits. Older 1024-bit keys are still accepted but are considered weak. Some providers like Google default to 2048-bit keys. If your key is shorter, contact your email provider to upgrade.