Rydoo provides different kind of email notifications across all roles. One of them is the automatic notifications per role that summarizes expense movement within your profile. If you are here to turn it off then, you are on the right screen.
Go to your Profile > Personal Settings > Mail > Set frequency to Never > Save
From your e-mail, click Manage email frequency. You will be redirected to your Rydoo Mail settings.
For your reference, this setting turns off the email notifications with the following subjects:
For User: Rydoo activity overview
For Approver: Rydoo approver activity overview
For Controller: Rydoo controller activity overview