Waiting list should send things out even if waiting list is disabled

src/pretix/base/services/waitinglist.py

@@ -74,5 +74,5 @@ def process_waitinglist(sender, **kwargs):
         live=True
     ).prefetch_related('_settings_objects', 'organizer___settings_objects').select_related('organizer')
     for e in qs:
-        if e.settings.waiting_list_enabled and e.settings.waiting_list_auto and e.presale_is_running:
+        if e.settings.waiting_list_auto and e.presale_is_running:
             assign_automatically.apply_async(args=(e.pk,))

src/pretix/control/forms/event.py

@@ -322,7 +322,8 @@ class EventSettingsForm(SettingsForm):
         label=_("Automatic waiting list assignments"),
         help_text=_("If ticket capacity becomes free, automatically create a voucher and send it to the first person "
                     "on the waiting list for that product. If this is not active, mails will not be send automatically "
-                    "but you can send them manually via the control panel."),
+                    "but you can send them manually via the control panel. If you disable the waiting list but keep "
+                    "this option enabled, tickets will still be sent out."),
         required=False,
         widget=forms.CheckboxInput(),
     )

src/pretix/plugins/sendmail/tasks.py

@@ -54,7 +54,7 @@ def send_mails(event: int, user: int, subject: dict, message: dict, orders: list
                     'pretix.plugins.sendmail.order.email.sent',
                     user=user,
                     data={
-                        'subject': subject.localize(o.locale),
+                        'subject': subject.localize(o.locale).format_map(email_context),
                         'message': message.localize(o.locale).format_map(email_context),
                         'recipient': o.email
                     }