fix search/new against possible email leakage

include/conversation.php

@@ -278,6 +278,9 @@ function conversation(&$a, $items, $mode, $update, $preview = false) {
 				else
 					$nickname = $a->user['nickname'];
 				
+				// prevent private email from leaking.
+				if($item['network'] === NETWORK_MAIL && local_user() != $item['uid'])
+						continue;
 			
 				$profile_name   = ((strlen($item['author-name']))   ? $item['author-name']   : $item['name']);
 				if($item['author-link'] && (! $item['author-name']))