diff --git a/index.php b/index.php
index d9d8341..1adfb1f 100644
--- a/index.php
+++ b/index.php
@@ -1,5 +1,6 @@
 <?php
 require 'vendor/autoload.php';
+require_once 'is_email.php';
 
 use Symfony\Component\HttpFoundation\Request;
 
@@ -33,4 +34,49 @@ $app->get('/', function (Request $request) use ($app) {
   ));
 });
 
+$app->post('/', function (Request $request) use ($app) {
+  $errors = array();
+
+  // collect the params
+  $user = $request->get('username',null);
+  $host = $request->get('host',null);
+  $email = $request->get('mail',null);
+  $password = $request->get('password',null);
+  $password_repeat = $request->get('password_repeat',null);
+
+  // check for errors
+  if (!$user) {
+    $errors[] = $app->trans('Kein Benutzername angegeben.');
+  }
+
+  if (!$host) {
+    $errors[] = $app->trans('Keinen Hostnamen angegeben.');
+  }
+
+  if (!$email) {
+    $errors[] = $app->trans('Keine E-Mail-Adresse angegeben.');
+  } else {
+    if (!is_email($email)) {
+      $errors[] = $app->trans('Keine gültige E-Mail-Adresse angegeben.');
+    }
+  }
+
+  if (!$password) {
+    $errors[] = $app->trans('Kein Passwort angegeben.');
+  }
+
+  if ($password != $password_repeat) {
+    $errors[] = $app->trans('Bitte gebe in den Feldern Passwort und Passwortwiederholung identische Werte ein.');
+  }
+  
+  if (count($errors) > 0) {
+    return $app['twig']->render('registration_form.twig', array(
+      'errors' => $errors,
+    ));
+  } else {
+    return $app['twig']->render('success.twig', array(
+    ));    
+  }
+});
+
 $app->run();
diff --git a/templates/registration_form.twig b/templates/registration_form.twig
index b0d163d..17453b8 100644
--- a/templates/registration_form.twig
+++ b/templates/registration_form.twig
@@ -21,6 +21,17 @@
 <!-- Form Name -->
 <legend>{% trans %}Ein XMPP-Konto registrieren{% endtrans %}</legend>
 
+{% if errors %}
+<div class="alert alert-danger">
+  <p>{% trans %}Bitte behebe folgende Fehler bevor du weiter machen kannst{% endtrans %}:</p>
+<ul>
+{% for error in errors %}
+<li>{{ error }}</li>
+{% endfor %}
+</ul>
+</div>
+{% endif %}
+
 <!-- Text input-->
 <div class="control-group">
   <label class="control-label" for="username">{% trans %}Benutzername{% endtrans %}</label>