Notifications from Dropbox off
- Log in to Dropbox a.
- Click in the top right next to your name on the drop-down arrow. From the menu, select the "settings".
- Switch to the tab "profile". Below you will see the "Preferences" and under the entry "E-Mail notifications".
- Here you can individually select which events you still want to be informed and about what. Select the hook in the respective Option.
- Finally, click on "save settings".

Disable notifications
Thus, your data will not be abused, you can use your Cloud storage with Boxcryptor to secure.