The error log is redirected to logs/ldap_ppolicy.err

plugins/password/drivers/ldap_ppolicy.php

@@ -31,7 +31,7 @@ class rcube_ldap_ppolicy_password
         $descriptorspec = array(
         		0 => array("pipe", "r"),  // stdin is a pipe that the child will read from
         		1 => array("pipe", "w"),  // stdout is a pipe that the child will write to
-        		2 => array("file", "/tmp/ppolicy_ldap.err", "a") // stderr is a file to write to
+        		2 => array("file", "logs/ldap_ppolicy.err", "a") // stderr is a file to write to
         );
         
         $cwd = 'plugins/password/drivers/';