EMail Notifications Are Not Working in New Expenses Implementation

Summary:

Setting up expenses in a Non Prod POD for first time.

E Mail notifications are enabled but no emails are being sent or received

Content (required):

Approval Notifications are are working as expected but no emails are being sent.

In Setup and Maintenance we have enabled Expense Report Approval Email Notifications

We also thought there should be other options in there like 'Expense Reimbursement Notifications'

This is the only place to enable email notifications as far as I can see. There are option in the Approval Rules but they are not mentioned in the documentation.

What step are we missing to get EMail Notifications working on this Test POD ?