All Users:
Sends email to all users in a specified course or
organization.
All Groups:
Sends email to all of the groups in a specified course or
organization.
All Teaching Assistants:
Sends email to all of the teaching assistants in a
specified course.
All Instructors:
Sends email to all of the instructors for a specified
course.
Select Users:
Sends email to a single user or select users in a
specified course.
Select Groups:
Send email to a single group or select groups in a course.