--- rcmail.module.old	2007-02-11 08:50:45.000000000 -0800
+++ rcmail.module	2007-02-11 08:50:36.000000000 -0800
@@ -136,7 +136,8 @@ function rcmail_menu() {
  */
 function rcmail_page(){
   global $user;
-  $content='<iframe width="850" height="550" src="./modules/rcmail/roundcubemail/index.php?do=login">foo</iframe>';
+  $module_path = base_path() . drupal_get_path('module', 'rcmail');
+  $content='<iframe width="850" height="550" src="' . $module_path . '/roundcubemail/index.php?do=login">foo</iframe>';
   print theme('page', $content);
 }