Currently, if a user has its email notifications on, the user will receive an email notification when a work task he's assigned to appears in his Work Exchange Inbox. Sometimes though, actions to take are spread out to multiple work tasks for the same assignment skill or group (too many steps in the same work task, too bloated) and an email is sent for every task, even if it's processed by the same user.

Add the option to enable or disable email notifications per work tasks individually (ON by default)