Alert: The reflector "dkim-test@testing.dkim.org" is currently at rfc 4871. The authres implementation and SSP/ASP implementations are pretty far behind. We will be updating this soon. The message corpus still needs to be updated -- Thank you

DomainKeys Identified Mail (DKIM) defines a simple, low cost, and effective mechanism by which cryptographic signatures can be applied to email messages, to demonstrate that the sender of the message was authorized to use a given email address. Message recipients can verify the signature by querying the signer's domain directly to determine whether the key that was used to sign the message was authorized by that domain for that address. This confirms that the message was sent by a party authorized to use the signer's email address.



The Purpose of this website is:

  • Share Testing Resources
  • Host a Reflector to test Signing
  • Share a Signed Mail Corpus that can be used to test the verifier
  • Documentation on how to use the available resources
  • Information related to the DKIM Mailing List


  • If you're interested in this effort, please join the mailing list by visiting:
    DKIM Testers or send an email to dkim-testers-subscribe@yahoogroups.com




    Last Modified:
    Comments concerning this site should be sent to:
    webmaster@testing.dkim.org