It depends:
If you have created your myCloud account before the 16th of November 2017 then you are logging in using Passeport. In this case you can link files directly from this account to your email using the integration button.
To do it:
- First login into myCloud.ch using your old account
- Then login into Bluewin.ch using your Swisscom login account.
- When you click on the button you will see the content of your old myCloud account.
If you have created your myCloud account after the 16th of November 2017 this will not be possible. If you log in into myCloud.ch you will be logged in automatically in bluewin as well with the same account.
For more information about Passeport and Swisscom login account please read here.