[shinigami]

Sure. So why do we need DKIM to authenticate contracts?

[baobabKoodaa]

Because, without DKIM, a dishonest party can repudiate the email. Just as a written contract is superior to an oral contract, a non repudiable written contract is superior to a repudiable written contract.

[shinigami]

So maybe digitally sign the contracts instead of unwillingly sign every single email you send?

[baobabKoodaa]

Please explain how I can make a webshop like amazon digitally sign a contract?

[shinigami]

Why do you need Amazon to digitally sign a contract?

[baobabKoodaa]

Was something unclear in my previous answer, when you asked the exact same thing and I answered your question?

[shinigami]

You didn't answer it. In which scenario Amazon would deny sending an email and you would be protected by DKIM?