diff --git a/book/service_container.rst b/book/service_container.rst
index 41fc7f51d1a..e4334c3943f 100644
--- a/book/service_container.rst
+++ b/book/service_container.rst
@@ -82,7 +82,7 @@ you need it::
     use Acme\HelloBundle\Mailer;
 
     $mailer = new Mailer('sendmail');
-    $mailer->send('ryan@foobar.net', ...);
+    $mailer->send('ryan@example.com', ...);
 
 This is easy enough. The imaginary ``Mailer`` class allows you to configure
 the method used to deliver the email messages (e.g. ``sendmail``, ``smtp``, etc).