Delegate Framework Email that are System Generated

We recently implemented Delegate Framework functionality within our Travel & Expense module. We have expense report submitters, HR supervisor approvers, and auditors. Emails generate for the different roles depending on what is occurring during the process; however, we have yet to fully comprehend or document all the emails for all of the roles. Can someone please provide a full complete list of all emails that generate for all roles within Delegate Framework?

We need to troubleshoot some issues and need to fully understand the email generation process. Thank you.