You need the private key to sign them, and the public key to validate the signature. Many of the public keys are hard to find now, since it’s been a few years. Many can still be validated, though. More info, an example, and a validator script here: https://github.com/robertdavidgraham/hunter-dkim
You need the private key to sign them, and the public key to validate the signature. Many of the public keys are hard to find now, since it’s been a few years. Many can still be validated, though. More info, an example, and a validator script here: https://github.com/robertdavidgraham/hunter-dkim