static void
post_data(const char *to, const char *from, const char *data)
{
    CURL *curl;
    long return_value;
    CURLcode curl_return_value;
    struct curl_httppost *first;
    struct curl_httppost *last;
    char error_buffer[CURL_ERROR_SIZE + 1] = { 0 };

    curl_global_init(CURL_GLOBAL_ALL);
    curl = curl_easy_init();
    VERIFY(curl != NULL);
    curl_return_value = curl_easy_setopt(curl, CURLOPT_URL, "http://192.168.1.104:8000/email");
    VERIFY(curl_return_value == 0);
    VERIFY(curl_formadd(&first, &last,
            CURLFORM_PTRNAME, "to",
            CURLFORM_PTRCONTENTS, to,
            CURLFORM_END) == 0);
    VERIFY(curl_formadd(&first, &last,
            CURLFORM_PTRNAME, "from",
            CURLFORM_PTRCONTENTS, from,
            CURLFORM_END) == 0);
    VERIFY(curl_formadd(&first, &last,
            CURLFORM_PTRNAME, "data",
            CURLFORM_PTRCONTENTS, data,
            CURLFORM_END) == 0);
    curl_easy_setopt(curl, CURLOPT_HTTPPOST, first);
    curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
    curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, error_buffer);

    curl_return_value = curl_easy_perform(curl);
    if (curl_return_value == 0)
    {
        curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &return_value);
        printf("Transfer returned %ld\n", return_value);
    }
    else
    {
        printf("curl_easy_perform returned %d\n", curl_return_value);
        printf("%s\n", error_buffer);
    }

    curl_formfree(first);

    curl_easy_cleanup(curl);
    curl_global_cleanup();

    exit(0);
}