if ($resultado->num_rows > 0) {

                        echo "<select class='status' name='id_status' id='queixa' style='float: left'>";
                        // output data of each row
                        while ($col = $resultado->fetch_assoc()) {
                            echo "<option value='" . $col['id_status'] . "'>" . $col['estado'] . "</option>";

                        }

                        echo "</select>";

                    }

                    echo "<a class='btn_ok' href='mail.php?email=" . $row["email"] . "&id_status=" . $col['id_status'] . "'>OK</a>";
                }

                echo "</td></tr></table>";