Added swiftmailers second argument for the send function within the SwiftmailerTrait

src/Silex/Application/SwiftmailerTrait.php

@@ -22,9 +22,11 @@ trait SwiftmailerTrait
      * Sends an email.
      *
      * @param \Swift_Message $message A \Swift_Message instance
+     * @param array $failedRecipients An array of failures by-reference
+     * @return int
      */
-    public function mail(\Swift_Message $message)
+    public function mail(\Swift_Message $message, &$failedRecipients = null)
     {
-        return $this['mailer']->send($message);
+        return $this['mailer']->send($message, $failedRecipients);
     }
 }