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+.. index::
+   single: Emails; Testing
+
+How to functionally test an Email is sent
+=========================================
+
+Sending e-mails with Symfony2 is pretty straight forward thanks to the
+``SwiftmailerBundle``, which leverages the power of the `Swiftmailer`_ library.
+
+To functionally test that e-mails are sent, and even assert their subjects,
+content or any other headers we can use :ref:`the Symfony2 Profiler <internals-profiler>`.
+
+Let's start with an easy controller action that sends an e-mail::
+
+    public function indexAction($name)
+    {
+        $message = \Swift_Message::newInstance()
+            ->setSubject('Hello Email')
+            ->setFrom('send@example.com')
+            ->setTo('recipient@example.com')
+            ->setBody('You should see me from the profiler!')
+        ;
+
+        $this->get('mailer')->send($message);
+
+        return $this->render(...);
+    }
+
+.. note::
+
+    Don't forget to enable profiler as explained in :doc:`/cookbook/testing/profiling`.
+
+And the ``WebTestCase`` to assert the e-mail content should be similar to::
+
+    // src/Acme/DemoBundle/Tests/Controller/MailControllerTest.php
+    use Symfony\Bundle\FrameworkBundle\Test\WebTestCase;
+
+    class MailControllerTest extends WebTestCase
+    {
+        public function testMailIsSentAndContentIsOk()
+        {
+            $client = static::createClient();
+            $crawler = $client->request('GET', 'your_action_route_here');
+
+            $mailCollector = $client->getProfile()->getCollector('swiftmailer');
+
+            // Check that an e-mail was sent
+            $this->assertEquals(1, $mailCollector->getMessageCount());
+
+            $collectedMessages = $mailCollector->getMessages();
+            $message = $collectedMessages[0];
+
+            // Asserting e-mail data
+            $this->assertInstanceOf('Swift_Message', $message);
+            $this->assertEquals('Hello Email', $message->getSubject());
+            $this->assertEquals('send@example.com', key($message->getFrom()));
+            $this->assertEquals('recipient@example.com', key($message->getTo()));
+            $this->assertEquals('You should see me from the profiler!', $message->getBody());
+        }
+    }
+