Using Squirrelmail 1.4.20 with PHP 5.2.6 on an Apache server at Streamline.net.
I have defined
$data_dir = SM_PATH . '../../sm/data/';
in my config.php file. This follows the recommendation to remove the directory from the htdocs path. Streamline also recommend always using relative paths, as the absolute path can change. This works fine
Running conf.pl alters this to
which is incorrect as the path is
but there is no need to alter it at all, as the relative path provided works and protects agains changes in the absolute path.