Account-related email notifications must go to the owner listed for the Stripe account. If you need to change the account owner, see Change account owner.
If you want account-related notifications to go to someone who is not the account owner, you can set up email forwarding to automatically forward certain emails from Stripe to other email addresses. Instructions on how to do this using Gmail can be found here.
If you would like someone else to receive payment-related notifications, such as payment successes, failures and disputes, you can add them as a team member and adjust their email notifications accordingly.