diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4aa2c217ab..e3c5e26cec 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,6 +23,7 @@ and this project adheres to
 - 🔧(project) change env.d system by using local files #1200
 - ⚡️(frontend) improve tree stability #1207
 - ⚡️(frontend) improve accessibility #1232
+- ⚡(backend) move email sending to celery
 
 ### Fixed
 
diff --git a/src/backend/core/api/viewsets.py b/src/backend/core/api/viewsets.py
index ee0c594eb1..182ce87ad6 100644
--- a/src/backend/core/api/viewsets.py
+++ b/src/backend/core/api/viewsets.py
@@ -37,7 +37,7 @@
 from core import authentication, choices, enums, models
 from core.services.ai_services import AIService
 from core.services.collaboration_services import CollaborationService
-from core.tasks.mail import send_ask_for_access_mail
+from core.tasks.mail import send_ask_for_access_mail, send_invitation_mail
 from core.utils import extract_attachments, filter_descendants
 
 from . import permissions, serializers, utils
@@ -1640,10 +1640,11 @@ def perform_create(self, serializer):
         access = serializer.save(document_id=self.kwargs["resource_id"])
 
         if access.user:
-            access.document.send_invitation_email(
+            send_invitation_mail.delay(
+                access.document.id,
                 access.user.email,
                 access.role,
-                self.request.user,
+                self.request.user.id,
                 access.user.language
                 or self.request.user.language
                 or settings.LANGUAGE_CODE,
@@ -1914,10 +1915,11 @@ def perform_create(self, serializer):
         """Save invitation to a document then send an email to the invited user."""
         invitation = serializer.save()
 
-        invitation.document.send_invitation_email(
+        send_invitation_mail.delay(
+            invitation.document.id,
             invitation.email,
             invitation.role,
-            self.request.user,
+            self.request.user.id,
             self.request.user.language or settings.LANGUAGE_CODE,
         )
 
diff --git a/src/backend/core/tasks/mail.py b/src/backend/core/tasks/mail.py
index 483c961486..299f1a6283 100644
--- a/src/backend/core/tasks/mail.py
+++ b/src/backend/core/tasks/mail.py
@@ -22,3 +22,24 @@ def send_ask_for_access_mail(ask_for_access_id):
                 access.user.email,
                 access.user.language or settings.LANGUAGE_CODE,
             )
+
+
+@app.task
+def send_mail(document_id, subject, emails, context=None, language=None):
+    """Send email from a document template."""
+    try:
+        document = models.Document.objects.get(id=document_id)
+        document.send_email(subject, emails, context, language)
+    except models.Document.DoesNotExist:
+        pass
+
+
+@app.task
+def send_invitation_mail(document_id, email, role, sender_id, language=None):
+    """Send invitation email for a document."""
+    try:
+        document = models.Document.objects.get(id=document_id)
+        sender = models.User.objects.get(id=sender_id)
+        document.send_invitation_email(email, role, sender, language)
+    except (models.Document.DoesNotExist, models.User.DoesNotExist):
+        pass