 By default, students have the ability to send email to any or all course users. To limit who your students can email for your course, go to the control panel. Click on customization, then tool availability. On the next page, scroll down to email and click the contextual menu button next to its name. From the drop-down menu, select email settings. On the next page, leave checked only those user types that you want students to be able to email. We suggest that you leave only all instructors and all teaching assistant users checked. Click submit. Please note that no matter what the type of restrictions you place on student email, instructors and TAs can always email all of the user types.