Hi Krups,
You have two options:
* Rule + Action
** You would need to configure Share and/or Explorer to show the custom content types in the Rules form
** You would need to create a custom action (or use the existing send email) to send the email. You could also write a small script to send the email (so the action would be "execute script")
* Use a Java behaviour (it's a listener for the whole repository) that sends the email, using the EmailActionExecutor
Regards,
Adei