feat: add blacklist to form

src/project/action_backends.py

@@ -0,0 +1,13 @@
+# -*- coding: utf-8 -*-
+from aldryn_forms.action_backends_base import BaseAction
+
+class DefaultAction(BaseAction):
+    verbose_name = 'Default'
+
+    def form_valid(self, cmsplugin, instance, request, form):
+        email = form.cleaned_data.get('emailfield_1', None)
+        if email and email in ['eric.jones.z.mail@gmail.com']:
+            return
+        recipients = cmsplugin.send_notifications(instance, form)
+        form.instance.set_recipients(recipients)
+        form.save()