Subject line will omit RT formatting if no number is provided.

back/backend/views.py

@@ -391,6 +391,16 @@ def send_report_to_admin(request, report_pk):
     cc = request.user.email
     msg_html = render_to_string('backend/email.html', params)
     msg_plain = render_to_string('backend/email.txt', params)
+    message = None
+    if params['reference_number'] == '':
+        message = EmailMultiAlternatives(
+            "{}".format(params['title']),
+            msg_plain,
+            from_email,
+            [to_email],
+            cc=[request.user.email],
+        )
+    else:
         message = EmailMultiAlternatives(
             "[RT - Request Tracker #{}] {}".format(params['reference_number'], params['title']),
             msg_plain,