@Test
public void testSendWithHeaders() throws SendWithUsException
{

    Map<String, String> headers = new HashMap<String, String>();
    headers.put("X-Auto-Response-Suppress", "header-value");

    SendWithUsSendRequest request = new SendWithUsSendRequest()
            .setEmailId(EMAIL_ID).setRecipient(defaultRecipientParams)
            .setSender(defaultSenderParams).setEmailData(defaultDataParams)
            .setHeaders(headers);

    SendReceipt sendReceipt = sendwithusAPI.send(request);

    assertSuccessfulAPIReceipt(sendReceipt);
}