diff --git a/CHANGELOG.md b/CHANGELOG.md
index f93540e9..1eab648f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,7 @@ and this project adheres to
 - ✨(frontend) add ErrorIcon component and support numeric icon sizes
 - ✨(frontend) make file upload abortable in driver layer
 - ✨(frontend) files preview v2
+- 🔧(project) add DJANGO_EMAIL_URL_APP environment variable
 
 ### Fixed
 
diff --git a/docs/env.md b/docs/env.md
index 1df21ef2..3edb4814 100644
--- a/docs/env.md
+++ b/docs/env.md
@@ -50,6 +50,7 @@ This document lists all configurable environment variables for the Drive applica
 | `EMAIL_HOST_USER` | SMTP username for email sending | `None` |
 | `EMAIL_LOGO_IMG` | Logo image URL for email templates | `None` |
 | `EMAIL_PORT` | SMTP port for email sending | `None` |
+| `EMAIL_URL_APP` | URL used in emails to link back to the app | `None` |
 | `EMAIL_USE_SSL` | Use SSL for SMTP connection | `False` |
 | `EMAIL_USE_TLS` | Use TLS for SMTP connection | `False` |
 | `FEATURES_ALPHA` | Enable alpha features | `False` |
diff --git a/docs/examples/helm/drive.values.yaml b/docs/examples/helm/drive.values.yaml
index 9000db9f..c0b66d5c 100644
--- a/docs/examples/helm/drive.values.yaml
+++ b/docs/examples/helm/drive.values.yaml
@@ -24,6 +24,7 @@ backend:
     DJANGO_EMAIL_HOST: "mailcatcher"
     DJANGO_EMAIL_LOGO_IMG: https://drive.127.0.0.1.nip.io/assets/logo-suite-numerique.png
     DJANGO_EMAIL_PORT: 1025
+    DJANGO_EMAIL_URL_APP: https://drive.127.0.0.1.nip.io
     DJANGO_EMAIL_USE_SSL: False
     LOGGING_LEVEL_LOGGERS_ROOT: INFO
     LOGGING_LEVEL_LOGGERS_APP: INFO
diff --git a/env.d/development/common b/env.d/development/common
index c78f1139..3316731c 100644
--- a/env.d/development/common
+++ b/env.d/development/common
@@ -20,6 +20,7 @@ DJANGO_EMAIL_BRAND_NAME="La Suite Numérique"
 DJANGO_EMAIL_HOST="mailcatcher"
 DJANGO_EMAIL_LOGO_IMG="http://localhost:3000/assets/logo-suite-numerique.png"
 DJANGO_EMAIL_PORT=1025
+DJANGO_EMAIL_URL_APP="http://localhost:3000"
 
 # Media
 STORAGES_STATICFILES_BACKEND=django.contrib.staticfiles.storage.StaticFilesStorage
diff --git a/src/backend/core/models.py b/src/backend/core/models.py
index 2931d751..3b1a1f10 100644
--- a/src/backend/core/models.py
+++ b/src/backend/core/models.py
@@ -915,17 +915,17 @@ class Item(TreeModel, BaseModel):
             return
 
         context = context or {}
-        domain = Site.objects.get_current().domain
+        base_url = settings.EMAIL_URL_APP or Site.objects.get_current().domain
         language = language or get_language()
         context.update(
             {
                 "brandname": settings.EMAIL_BRAND_NAME,
                 "item": self,
-                "domain": domain,
+                "domain": base_url,
                 "link": (
-                    f"{domain}/explorer/items/files/{self.id}/"
+                    f"{base_url}/explorer/items/files/{self.id}/"
                     if self.type == ItemTypeChoices.FILE
-                    else f"{domain}/explorer/items/{self.id}/"
+                    else f"{base_url}/explorer/items/{self.id}/"
                 ),
                 "logo_img": settings.EMAIL_LOGO_IMG,
             }
diff --git a/src/backend/core/tests/test_models_items.py b/src/backend/core/tests/test_models_items.py
index d062d66d..678e736f 100644
--- a/src/backend/core/tests/test_models_items.py
+++ b/src/backend/core/tests/test_models_items.py
@@ -847,6 +847,35 @@ def test_models_items__email_invitation__link_for_file():
     assert f"/explorer/items/{item.id}/" not in email.body
 
 
+@pytest.mark.parametrize(
+    "email_url_app",
+    [
+        "https://test-example.com",  # Test with EMAIL_URL_APP set
+        None,  # Test fallback to Site domain
+    ],
+)
+def test_models_items__email_invitation__url_app_param(email_url_app, settings):
+    """
+    Email invitation uses EMAIL_URL_APP when set, or falls back to the Site domain.
+    """
+    settings.EMAIL_URL_APP = email_url_app
+
+    item = factories.ItemFactory(type=models.ItemTypeChoices.FOLDER)
+    sender = factories.UserFactory()
+
+    item.send_invitation_email("guest@example.com", models.RoleChoices.EDITOR, sender, "en")
+
+    # pylint: disable-next=no-member
+    email = mail.outbox[-1]
+    email_content = " ".join(email.body.split())
+
+    if email_url_app:
+        assert f"https://test-example.com/explorer/items/{item.id}/" in email_content
+    else:
+        # Default Site domain is example.com
+        assert f"example.com/explorer/items/{item.id}/" in email_content
+
+
 @mock.patch(
     "core.models.send_mail",
     side_effect=smtplib.SMTPException("Error SMTPException"),
diff --git a/src/backend/drive/settings.py b/src/backend/drive/settings.py
index 7e5bd0a9..ff615362 100755
--- a/src/backend/drive/settings.py
+++ b/src/backend/drive/settings.py
@@ -1000,6 +1000,7 @@ class Base(Configuration):
     EMAIL_HOST_PASSWORD = SecretFileValue(None)
     EMAIL_LOGO_IMG = values.Value(None)
     EMAIL_PORT = values.PositiveIntegerValue(None)
+    EMAIL_URL_APP = values.Value(None)
     EMAIL_USE_TLS = values.BooleanValue(False)
     EMAIL_USE_SSL = values.BooleanValue(False)
     EMAIL_FROM = values.Value("from@example.com")
diff --git a/src/helm/env.d/dev/values.drive.yaml.gotmpl b/src/helm/env.d/dev/values.drive.yaml.gotmpl
index ddb48aea..7e28951f 100644
--- a/src/helm/env.d/dev/values.drive.yaml.gotmpl
+++ b/src/helm/env.d/dev/values.drive.yaml.gotmpl
@@ -24,6 +24,7 @@ backend:
     DJANGO_EMAIL_HOST: "mailcatcher"
     DJANGO_EMAIL_LOGO_IMG: https://drive.127.0.0.1.nip.io/assets/logo-suite-numerique.png
     DJANGO_EMAIL_PORT: 1025
+    DJANGO_EMAIL_URL_APP: https://drive.127.0.0.1.nip.io
     DJANGO_EMAIL_USE_SSL: False
     LOGGING_LEVEL_LOGGERS_ROOT: INFO
     LOGGING_LEVEL_LOGGERS_APP: INFO