If you're receiving email notifications every time a student enrolls in your course, you can easily turn this off within the course settings. Follow the steps below to disable enrollment notifications on a course-by-course basis.
- Navigate to Your Course 
 Log in to Moodle and go to the course for which you want to disable enrollment notifications.
- Access the Participants List 
 In the course navigation menu, click on Participants. 
- Open Enrollment Methods 
 In the top-right corner, click the drop-down list select Enrollment methods.
- Edit Manual Enrolments 
 Locate the Manual enrolments method (or the enrollment method currently in use), and click the Edit icon (⚙️) next to it. 
- Disable Notifications 
 Find the option labeled "Send course welcome message".
 Set it to No.  
- Save Changes 
 Scroll down and click Save changes.
