interface/web/admin/form/server_config.tform.php
@@ -319,6 +319,10 @@ 'datatype' => 'VARCHAR', 'formtype' => 'TEXT', 'default' => '', 'validators' => array ( 0 => array ( 'type' => 'REGEX', 'regex' => '/^(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)*([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9\-]*[A-Za-z0-9])(,\s*(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)*([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9\-]*[A-Za-z0-9]))*$/', 'errmsg'=> 'rbl_error_regex'), ), 'value' => '', 'width' => '40', 'maxlength' => '255'