Use Email tasks anywhere in a workflow or worklet. For example, you might configure a workflow to send an email if a certain number of rows fail for a session.
For example, you may have a Session task in the workflow and you want the Integration Service to send an email if more than 20 rows are dropped. To do this, you create a condition in the link, and create a non-reusable Email task. The workflow sends an email if the session fails more than 20 rows are dropped.