For whatever reason, you can remove any email you've connected to SharedBox.
Do this by clicking the Login button on the homepage (sharedbox.app). This will redirect you to Slack for authentication and take you to your SharedBox dashboard
Click the email you want to remove at the left hand side of the dashboard.
Click the settings link on the email page.
Scroll to the bottom of the settings page and click the "Delete Email" button. This will prompt you to confirm the action and will delete all related data for the email (emails, contacts...) on SharedBox.
If there are parts of this document that is confusing, kindly send a mail to firstname.lastname@example.org or use the live chat button.