Below are screen shots with examples of the email notifications you'll receive if you've selected to receive email for submissions from Tests & Quizzes.  There are several types of notifications, corresponding to the different ways in which an assessment can be submitted:

1. Manual submission: A student clicks the Submit for Grading button on the Assessment Submission Warning screen to confirm submitting an assessment.
2. Timer submission: The timer expires on a timed assessment and automatically submits the assessment for the student.
3. Automatic submission: An instructor has configured an assessment to Autosubmit saved student work after latest acceptance date, unless student has previously submitted.  A student saves content in the assessment and exits it before the latest acceptance date, so the assessment remains In Progress.  The saved assessment is automatically submitted at the latest acceptance date provided no other attempt has been submitted.