Index: pluggable.php
===================================================================
--- pluggable.php	(revision 18963)
+++ pluggable.php	(working copy)
@@ -440,6 +440,7 @@
 	try {
 		$phpmailer->Send();
 	} catch ( phpmailerException $e ) {
+		do_action_ref_array( 'php_mailer_failed', array( &$phpmailer ) );
 		return false;
 	}