Merge pull request #14688 from edx/efischer/email_all_modes

All modes are valid bulk email targets

lms/djangoapps/instructor/views/instructor_dashboard.py

@@ -637,7 +637,7 @@ def _section_send_email(course, access):
     course_modes = []
     from verified_track_content.models import VerifiedTrackCohortedCourse
     if not VerifiedTrackCohortedCourse.is_verified_track_cohort_enabled(course_key):
-        course_modes = CourseMode.modes_for_course(course_key)
+        course_modes = CourseMode.modes_for_course(course_key, include_expired=True, only_selectable=False)
     email_editor = fragment.content
     section_data = {
         'section_key': 'send_email',