Plesk 11.x / Windows :: Limit Notification Emails To Specific Administrator

The 'Additional Administrator Accounts' feature enables a Plesk login to be created for each administrator, so they don't have to share a login, which is good practice.

However, Plesk sends notification emails (e.g. Notification of problem domains) to all the administrators. How can we control who is sent notification emails? In our case, we only want them to go the main admin account.

In the 'Additional Administrator Accounts' form, the 'email' field requires a value. We could set this to a dummy value, but this would probably generate non-delivery emails.