is the issue that the email address is still filled in by the previous user if you scan? are you using accounting?
what firmware level is your machine?
I scanned and emailed a document to myself and several other people in the office. I then deleted the email addresses from the Xerox 5638. I then got reports from other people who scanned documents and emailed documents to themselves that they got copies of the document that I had sent. How do I ensure that my document does not get sent to the next person who scans and emails?