diff --git a/djangoldp_notification/models.py b/djangoldp_notification/models.py
index 1fc0cec..e99fcda 100644
--- a/djangoldp_notification/models.py
+++ b/djangoldp_notification/models.py
@@ -1,5 +1,3 @@
-import logging
-
 import requests
 from django.conf import settings
 from django.contrib.auth import get_user_model
@@ -13,10 +11,14 @@ from django.urls import NoReverseMatch, get_resolver
 from django.utils.translation import ugettext_lazy as _
 from djangoldp.fields import LDPUrlField
 from djangoldp.models import Model
-from threading import Thread
+from djangoldp.activities.services import ActivityQueueService, ActivityPubService, activity_sending_finished
 from djangoldp_notification.middlewares import MODEL_MODIFICATION_USER_FIELD
 from djangoldp_notification.permissions import InboxPermissions, SubscriptionsPermissions
 from djangoldp_notification.views import LDPNotificationsViewSet
+import logging
+
+
+logger = logging.getLogger('djangoldp')
 
 
 class Notification(Model):
@@ -115,7 +117,10 @@ def create_nested_subscribers(sender, instance, created, **kwargs):
 @receiver(post_delete, dispatch_uid="delete_callback_notif")
 def send_notification(sender, instance, **kwargs):
     if sender != Notification:
-        threads = []
+        # don't send notifications for foreign resources
+        if hasattr(instance, 'urlid') and Model.is_external(instance.urlid):
+            return
+
         recipients = []
         try:
             url_container = settings.BASE_URL + Model.container_id(instance)
@@ -125,47 +130,55 @@ def send_notification(sender, instance, **kwargs):
 
         # dispatch a notification for every Subscription on this resource
         for subscription in Subscription.objects.filter(models.Q(object=url_resource) | models.Q(object=url_container)):
-            if not instance.is_backlink and subscription.inbox not in recipients and \
-                    (not subscription.is_backlink or not kwargs.get("created")):
+            if subscription.inbox not in recipients and (not subscription.is_backlink or not kwargs.get("created")):
                 # I may have configured to send the subscription to a foreign key
                 if subscription.field is not None and len(subscription.field) > 1:
                     try:
                         instance = getattr(instance, subscription.field, instance)
+
+                        # don't send notifications for foreign resources
+                        if hasattr(instance, 'urlid') and Model.is_external(instance.urlid):
+                            continue
+
                         url_resource = settings.BASE_URL + Model.resource_id(instance)
                     except NoReverseMatch:
                         continue
                     except ObjectDoesNotExist:
                         continue
 
-                process = Thread(target=send_request, args=[subscription.inbox, url_resource, instance,
-                                                            kwargs.get("created", False)])
-                process.start()
-                threads.append(process)
+                send_request(subscription.inbox, url_resource, instance, kwargs.get("created", False))
                 recipients.append(subscription.inbox)
 
 
+@receiver(activity_sending_finished, sender=ActivityQueueService)
+def _handle_prosody_response(sender, response, saved_activity, **kwargs):
+    '''callback function for handling a response from Prosody on a notification'''
+    # if text is defined in the response body then it's an error
+    if saved_activity is not None:
+        response_body = saved_activity.response_to_json()
+        if 'condition' in response_body:
+            logger.error("[DjangoLDP-Notification.models._handle_prosody_response] error in Prosody response " +
+                         str(response_body))
+
+
 def send_request(target, object_iri, instance, created):
     unknown = str(_("Auteur inconnu"))
     author = getattr(getattr(instance, MODEL_MODIFICATION_USER_FIELD, unknown), "urlid", unknown)
     request_type = "creation" if created else "update"
 
-    try:
-        # local inbox
-        if target.startswith(settings.SITE_URL):
-            user = Model.resolve_parent(target.replace(settings.SITE_URL, ''))
-            Notification.objects.create(user=user, object=object_iri, type=request_type, author=author)
-        # external inbox
-        else:
-            json = {
-                "@context": settings.LDP_RDF_CONTEXT,
-                "object": object_iri,
-                "author": author,
-                "type": request_type
-            }
-            requests.post(target, json=json, headers={"Content-Type": "application/ld+json"})
-    except Exception as e:
-        logging.error('Djangoldp_notifications: Error with request: {}'.format(e))
-    return True
+    # local inbox
+    if target.startswith(settings.SITE_URL):
+        user = Model.resolve_parent(target.replace(settings.SITE_URL, ''))
+        Notification.objects.create(user=user, object=object_iri, type=request_type, author=author)
+    # external inbox
+    else:
+        json = {
+            "@context": settings.LDP_RDF_CONTEXT,
+            "object": object_iri,
+            "author": author,
+            "type": request_type
+        }
+        ActivityQueueService.send_activity(target, json)
 
 
 @receiver(post_save, sender=Notification)
diff --git a/setup.cfg b/setup.cfg
index a7120f4..78936c3 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -10,7 +10,7 @@ license = MIT
 [options]
 packages = find:
 install_requires =
-    djangoldp>=1.0.0
+    djangoldp>=1.2.0
 
 [options.extras_require]
 include_package_data = True