Create Expense from Email Receipts

Hi team,

We enabled the option to create expenses from email receipts, however could you advise:

1. How to submit expenses from emails for delegate users?
2. Out of the three attempts the only expense created was the email with typed information in the body of the email. For image attachments,
the system didn't recognize any details, creating a $0 amount expense item with wrong merchant and type. How can this be corrected?
3. All test submissions were automatically coded to an expense type. How can we change the default expense type?

Thank you in advance for your help.