To change your email notification settings, go to your user profile page by clicking the user icon at the top right page then select View Profile.
Here, you can use the sliders to change the level of movement at which you are emailed. Slide it to the right to increase the activity value that determines when an email will be sent to you.
You can click on the checkmarks below the new business & expansion or the churn & contraction sliders to disable emails of either category.
Please click on "Update" for the changes to take effect.