Fix scoping issue in mail_send_task

src/pretix/base/services/mail.py

@@ -220,6 +220,17 @@ def mail_send_task(self, *args, to: List[str], subject: str, body: str, html: st
     email = EmailMultiAlternatives(subject, body, sender, to=to, bcc=bcc, headers=headers)
     if html is not None:
         email.attach_alternative(html, "text/html")
+
+    if event:
+        with scopes_disabled():
+            event = Event.objects.get(id=event)
+        backend = event.get_mail_backend()
+        cm = lambda: scope(organizer=event.organizer)  # noqa
+    else:
+        backend = get_connection(fail_silently=False)
+        cm = lambda: scopes_disabled()  # noqa
+
+    with cm():
         if invoices:
             invoices = Invoice.objects.filter(pk__in=invoices)
             for inv in invoices:
@@ -233,17 +244,6 @@ def mail_send_task(self, *args, to: List[str], subject: str, body: str, html: st
                     except:
                         logger.exception('Could not attach invoice to email')
                         pass
-
-    if event:
-        with scopes_disabled():
-            event = Event.objects.get(id=event)
-        backend = event.get_mail_backend()
-        cm = lambda: scope(organizer=event.organizer)  # noqa
-    else:
-        backend = get_connection(fail_silently=False)
-        cm = lambda: scopes_disabled()  # noqa
-
-    with cm():
         if event:
             if order:
                 try: