Quick User Reminder Pro 2.3.0

This plugin notifies users from non-activated and/or inactive user accounts in Joomla! automatically. You can individually configure the account types to be deleted (not activated, not logged in or inactive) by specifying a time period. If user accounts match the type and the selected period of time, the associated users are automatically notified when a specific event occurs. For example, you can remind users to confirm their registration or to come back to your site.
The pro version of Quick User Reminder offers you the ability to send emails to administrator and set up individual email texts for each type of accounts. Use tags like %username% as placeholder for user data in your own email texts. Check your email settings by sending test mails. You can also limit the amount of users that should be notified at the same time.