To be able to open email links with ownCloud Mail you just have to change a little setting in the browser field in Chrome. This is how to do it:

  1.  open the owncloud mail app
  2. Press on the little icon in the upper right corner in ChromE

    gmail-install-service-handler

  3. Choose “Use example.com” and then Done.
    open-gmail-in-chrome
  4. Now all your email links will be opened with your ownCloud Mail app. Simple as that!
Pro tip

Use Gmail as sendmail email relay.