protected function getFullEmail($id)
  {
    try
    {
      $response = $this->sendRequest('GET', "/api/v1/inboxes/{$this->config['inbox_id']}/messages/{$id}");
    }
    catch(Exception $e)
    {
      $this->fail('Exception: ' . $e->getMessage());
    }
    $fullEmail = json_decode($response->getBody());
    return $fullEmail;
  }