Можете отправить динамической теле письма на скручиваемость

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Я новичок в CURL и пытаюсь отправить динамическое тело сообщения. Но я получаю только пустую тему и тело сообщения, когда пытаюсь использовать curl lib в visual c++.
Пожалуйста помочь.

Что я уже пробовал:

<pre>    size_t Process::processmail(void *ptr, size_t size, size_t nmemb, void *userp)
    {
	std::string a, b, c, d;
	std::string arr[MAXSPACE];
	std::string search = ",";
	int spacePos;
	int currPos = 0;
	int k = 0;
	int prevPos = 0;
	std::string &statistics = *(static_cast<std::string*>(userp));
	do
	{
		spacePos = statistics.find(search, currPos);
		if (spacePos >= 0)
		{

			currPos = spacePos;
			arr[k] = statistics.substr(prevPos, currPos - prevPos);
			currPos++;
			prevPos = currPos;
			k++;
		}
	} while (spacePos >= 0);

	arr[k] = statistics.substr(prevPos, statistics.length());

	for (int i = 0; i < k; i++)
	{
		std::cout << arr[i] << std::endl;
	}
	a = arr[3];
	b = arr[2];
	c = arr[1];
	d = arr[0];
	const char *data;
	time_t now = time(0);
	char* dt = ctime(&now);
	const char *payload_text[] = {
		"Date: ", dt, "\r\n",
		"To: ",mail.c_str(), "\r\n",
		"From: " FROM "\r\n",
		"Subject: Analysis\r\n",
		"\r\n",
		"This is just a test message.\r\n",
		"\r\n",
		"A:", a.c_str(), "\r\n",
		"B:", b.c_str(), "\r\n",
		"C:", c.c_str(), "\r\n",
		NULL
	};

		if ((size == 0) || (nmemb == 0) || ((size*nmemb) < 1)) {
		return 0;
	}

	data = payload_text[lines_read];

	if (data) {
		size_t len = strlen(data);
		memcpy(ptr, data, len);
		lines_read++;
		return len;
	}
	return 0;
    }

     void Process::sendmail(std::string mail)
    {
	CURL *curl;
	CURLcode res = CURLE_OK;
	struct curl_slist *recipients = NULL;
	curl = curl_easy_init();
	if (curl) {
	
		curl_easy_setopt(curl, CURLOPT_USERNAME, "User Name");
		curl_easy_setopt(curl, CURLOPT_PASSWORD, "Password");
		curl_easy_setopt(curl, CURLOPT_URL, "smtp.hushmail.com:587");
		curl_easy_setopt(curl, CURLOPT_USE_SSL, (long)CURLUSESSL_ALL);
		curl_easy_setopt(curl, CURLOPT_CAINFO, "/path/to/certificate.pem");
		curl_easy_setopt(curl, CURLOPT_MAIL_FROM, FROM);
		recipients = curl_slist_append(recipients, mail.c_str());
		curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, recipients);
		curl_easy_setopt(curl, CURLOPT_READFUNCTION, &Process::processmail);
		curl_easy_setopt(curl, CURLOPT_READDATA, lines_read);
		curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);

		
		curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);

		
		res = curl_easy_perform(curl);

		
		if (res != CURLE_OK)
			fprintf(stderr, "curl_easy_perform() failed: %s\n",
			curl_easy_strerror(res));

		
		curl_slist_free_all(recipients);

		curl_easy_cleanup(curl);
	 }
    }

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