cap hpi check uses email to send our alerts, reports, certificates and other information. Changing any of these is simple and requires you to access the Email Maintenance section from the profile dropdown in the top right of the screen.
From here you can change the email associated with any of the items that get sent out. Only 1 email can be provided for each item, and there are links throughout the relevant products to access this screen if you need to change it again at a later date.