diff --git a/config/environments/development.rb b/config/environments/development.rb
index 4b96a6c33..96dc809bb 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -39,9 +39,17 @@ Rails.application.configure do
   # Raises helpful error messages.
   config.assets.raise_runtime_errors = true
 
-  config.action_mailer.delivery_method = :test
+  # Action Mailer settings
+  config.action_mailer.delivery_method = :smtp
   config.action_mailer.default_url_options = { host: 'localhost', port: 3000 }
 
+  # Config for mailcatcher https://mailcatcher.me/
+  config.action_mailer.smtp_settings = {
+    :address => "localhost",
+    :port => 1025,
+    :locale => 'fr'
+  }
+
   # Raises error for missing translations
   # config.action_view.raise_on_missing_translations = true
 
diff --git a/spec/mailers/previews/notification_mailer_preview.rb b/spec/mailers/previews/notification_mailer_preview.rb
new file mode 100644
index 000000000..dda299980
--- /dev/null
+++ b/spec/mailers/previews/notification_mailer_preview.rb
@@ -0,0 +1,5 @@
+class NotificationMailerPreview < ActionMailer::Preview
+  def dossier_received
+    NotificationMailer.dossier_received(Dossier.last)
+  end
+end