CCM 702: Extesion example for custom email notification
One answer
This blog shows how an Asynchronous task can be used for custom e-mail notification: https://rsjazz.wordpress.com/2015/10/16/due-date-notifier-an-asynchronous-task-example/
The E-mail related APIs would be the same for other approaches such as running it in a follow up action as example.