Documentation – Change Template for E-Mail

[signalwerk]

How do I configure the E-Mail-Template for the Registration activation in /Configuration/Views.yaml

I tried

-
  requestFilter: 'mainRequest.isPackage("Neos.Neos") && isPackage("Sandstorm.UserManagement") && isController("Registration") && isAction("register")'
  options:
    templatePathAndFilename: 'resource://xxx.yyy/Private/EmailTemplates/ActivationToken.html'
    partialRootPaths: ['resource://xxx.yyy/Private/Partials']
    layoutRootPaths: ['resource://xxx.yyy/Private/Layouts']

But this changes the output on the website and not the activation mail.