By default, instructors in a course will receive an email every time a student makes a Turnitin submission within Moodle.  If you'd prefer not to receive these emails, you can adjust your settings to stop any emails.  This is a Moodle-wide setting and will affect all your courses.

Instructions

To change your notification preferences, click on your name on the top right of the screen → Preferences → User account → Messaging.  Scroll down to the sections for Turnitin Assignment and Turnitin plagiarism plugin and uncheck the boxes to prevent emails being send whether you are on or offline.

Video instructions