From 64550fa6c19245cc684278d382adfc80a89c05d8 Mon Sep 17 00:00:00 2001
From: Petr Skoda <commits@skodak.org>
Date: Mon, 2 Jan 2012 22:36:37 +0100
Subject: [PATCH] MDL-13572 do not send emails to invalid addresses

---
 message/output/email/message_output_email.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/message/output/email/message_output_email.php b/message/output/email/message_output_email.php
index f6c82ed00c6..c48e238a51d 100644
--- a/message/output/email/message_output_email.php
+++ b/message/output/email/message_output_email.php
@@ -51,6 +51,7 @@ class message_output_email extends message_output {
 
         //check if the recipient has a different email address specified in their messaging preferences Vs their user profile
         $emailmessagingpreference = get_user_preferences('message_processor_email_email', null, $eventdata->userto);
+        $emailmessagingpreference = clean_param($emailmessagingpreference, PARAM_EMAIL);
         if (!empty($emailmessagingpreference)) {
             //clone to avoid altering the actual user object
             $recipient = clone($eventdata->userto);