--- lib.php	2012-09-27 19:23:38.000000000 +0200
+++ lib.php_imb	2012-09-27 19:23:21.000000000 +0200
@@ -542,6 +542,12 @@
 
                 //if we want to check that userto and userfrom are not the same person this is probably the spot to do it
 
+                //Patch for MDL-29534. If forum_replytouser param in forum module is unchecked send mail using the noreplyaddress
+		//by: marcoblancas 27/09/2012
+		//tested on: 2.2.4
+		if (!$CFG->forum_replytouser)
+	            $userfrom->email=$CFG->noreplyaddress;
+
                 // setup global $COURSE properly - needed for roles and languages
                 cron_setup_user($userto, $course);