arf_current_autoresponse_set_outside

add_filter('arf_current_autoresponse_set_outside', 'your_function', 10, 2);

function your_function($active, $data){



    $opt-in_data = @maybe_unserialize(isset($data[0]['OPT-IN']) ? $data[0]['OPT-IN'] : '' );

    if (isset($opt-in_data['enable']) && $opt-in_data['enable'] == 1) {

        $active = 'OPT-IN';

    }

    return $active;



}