diff --git a/lib/Alchemy/Phrasea/Controller/Admin/Dashboard.php b/lib/Alchemy/Phrasea/Controller/Admin/Dashboard.php
index cb26c7743b..106461fb01 100644
--- a/lib/Alchemy/Phrasea/Controller/Admin/Dashboard.php
+++ b/lib/Alchemy/Phrasea/Controller/Admin/Dashboard.php
@@ -13,6 +13,7 @@ namespace Alchemy\Phrasea\Controller\Admin;
 
 use Alchemy\Phrasea\Notification\Receiver;
 use Alchemy\Phrasea\Notification\Mail\MailTest;
+use Alchemy\Phrasea\Exception\InvalidArgumentException;
 use Silex\Application;
 use Silex\ControllerProviderInterface;
 use Symfony\Component\HttpFoundation\Request;
@@ -187,7 +188,12 @@ class Dashboard implements ControllerProviderInterface
             $app->abort(400, 'Bad request missing email parameter');
         };
 
-        $receiver = new Receiver(null, $mail);
+        try {
+            $receiver = new Receiver(null, $mail);
+        } catch (InvalidArgumentException $e) {
+            return $app->redirect('/admin/dashboard/?email=not-sent');
+        }
+
         $mail = MailTest::create($app, $receiver);
 
         $app['notification.deliverer']->deliver($mail);
diff --git a/lib/Alchemy/Phrasea/Controller/Prod/Export.php b/lib/Alchemy/Phrasea/Controller/Prod/Export.php
index cac88af3db..08195f8570 100644
--- a/lib/Alchemy/Phrasea/Controller/Prod/Export.php
+++ b/lib/Alchemy/Phrasea/Controller/Prod/Export.php
@@ -13,6 +13,7 @@ namespace Alchemy\Phrasea\Controller\Prod;
 
 use Silex\Application;
 use Silex\ControllerProviderInterface;
+use Alchemy\Phrasea\Exception\InvalidArgumentException;
 use Alchemy\Phrasea\Notification\Emitter;
 use Alchemy\Phrasea\Notification\Receiver;
 use Alchemy\Phrasea\Notification\Mail\MailRecordsExport;
@@ -285,7 +286,11 @@ class Export implements ControllerProviderInterface
             $emitter = new Emitter($app['phraseanet.user']->get_display_name(), $app['phraseanet.user']->get_email());
 
             foreach ($destMails as $key => $mail) {
-                $receiver = new Receiver(null, trim($mail));
+                try {
+                    $receiver = new Receiver(null, trim($mail));
+                } catch (InvalidArgumentException $e) {
+                    continue;
+                }
 
                 $mail = MailRecordsExport::create($app, $receiver, $emitter, $request->request->get('textmail'));
                 $mail->setButtonUrl($url);
diff --git a/lib/Alchemy/Phrasea/Helper/User/Edit.php b/lib/Alchemy/Phrasea/Helper/User/Edit.php
index b5e94425dd..6315d4adba 100644
--- a/lib/Alchemy/Phrasea/Helper/User/Edit.php
+++ b/lib/Alchemy/Phrasea/Helper/User/Edit.php
@@ -12,6 +12,7 @@
 namespace Alchemy\Phrasea\Helper\User;
 
 use Alchemy\Phrasea\Application;
+use Alchemy\Phrasea\Exception\InvalidArgumentException;
 use Alchemy\Phrasea\Notification\Mail\MailSuccessEmailUpdate;
 use Alchemy\Phrasea\Notification\Receiver;
 use Symfony\Component\HttpFoundation\Request;
@@ -539,15 +540,27 @@ class Edit extends \Alchemy\Phrasea\Helper\Helper
         $new_email = $user->get_email();
 
         if ($old_email != $new_email) {
+            try {
+                $oldReceiver = new Receiver(null, $old_email);
+            } catch (InvalidArgumentException $e) {
 
-            $newReceiver = new Receiver(null, $new_email);
-            $oldReceiver = new Receiver(null, $old_email);
+            }
 
-            $mailOldAddress = MailSuccessEmailUpdate::create($this->app, $oldReceiver, null, sprintf(_('You will now receive notifications at %s'), $new_email));
-            $mailNewAddress = MailSuccessEmailUpdate::create($this->app, $newReceiver, null, sprintf(_('You will no longer receive notifications at %s'), $old_email));
+            if ($oldReceiver) {
+                $mailOldAddress = MailSuccessEmailUpdate::create($this->app, $oldReceiver, null, sprintf(_('You will now receive notifications at %s'), $new_email));
+                $this->app['notification.deliverer']->deliver($mailOldAddress);
+            }
 
-            $this->app['notification.deliverer']->deliver($mailOldAddress);
-            $this->app['notification.deliverer']->deliver($mailNewAddress);
+            try {
+                $newReceiver = new Receiver(null, $new_email);
+            } catch (InvalidArgumentException $e) {
+
+            }
+
+            if ($newReceiver) {
+                $mailNewAddress = MailSuccessEmailUpdate::create($this->app, $newReceiver, null, sprintf(_('You will no longer receive notifications at %s'), $old_email));
+                $this->app['notification.deliverer']->deliver($mailNewAddress);
+            }
         }
 
         return $this;
diff --git a/lib/classes/task/period/ftp.php b/lib/classes/task/period/ftp.php
index 5b6c845893..a3f852b5c7 100644
--- a/lib/classes/task/period/ftp.php
+++ b/lib/classes/task/period/ftp.php
@@ -8,6 +8,7 @@
  * file that was distributed with this source code.
  */
 
+use Alchemy\Phrasea\Exception\InvalidArgumentException;
 use Alchemy\Phrasea\Notification\Mail\MailSuccessFTP;
 use Alchemy\Phrasea\Notification\Receiver;
 
@@ -658,17 +659,31 @@ class task_period_ftp extends task_appboxAbstract
         $sender_message = $text_mail_sender . $message;
         $receiver_message = $text_mail_receiver . $message;
 
-        $receiver = new Receiver(null, $sendermail);
-        $mail = MailSuccessFTP::create($this->dependencyContainer, $receiver, null, $sender_message);
-        $mail->setServer($ftp_server);
+        $receiver = null;
+        try {
+            $receiver = new Receiver(null, $sendermail);
+        } catch (InvalidArgumentException $e) {
 
-        $this->dependencyContainer['notification.deliverer']->deliver($mail);
+        }
 
-        $receiver = new Receiver(null, $mail);
-        $mail = MailSuccessFTP::create($this->dependencyContainer, $receiver, null, $receiver_message);
-        $mail->setServer($ftp_server);
+        if ($receiver) {
+            $mail = MailSuccessFTP::create($this->dependencyContainer, $receiver, null, $sender_message);
+            $mail->setServer($ftp_server);
+            $this->dependencyContainer['notification.deliverer']->deliver($mail);
+        }
 
-        $this->dependencyContainer['notification.deliverer']->deliver($mail);
+        $receiver = null;
+        try {
+            $receiver = new Receiver(null, $mail);
+        } catch (InvalidArgumentException $e) {
+
+        }
+
+        if ($receiver) {
+            $mail = MailSuccessFTP::create($this->dependencyContainer, $receiver, null, $receiver_message);
+            $mail->setServer($ftp_server);
+            $this->dependencyContainer['notification.deliverer']->deliver($mail);
+        }
     }
 
     public function logexport(record_adapter $record, $obj, $ftpLog)