remoce strtolower from rspamd_url

interface/web/admin/form/server_config.tform.php

@@ -723,8 +723,7 @@ $form["tabs"]['mail'] = array(
 			'default' => '',
 			'filters'   => array(
 				0 => array( 'event' => 'SAVE', 'type' => 'IDNTOASCII'),
-				1 => array( 'event' => 'SHOW', 'type' => 'IDNTOUTF8'),
-				2 => array( 'event' => 'SAVE', 'type' => 'TOLOWER')
+				1 => array( 'event' => 'SHOW', 'type' => 'IDNTOUTF8')
 			),
 			'value' => '',
 			'width' => '40',