1/***************************************************************************
2 *                                  _   _ ____  _
3 *  Project                     ___| | | |  _ \| |
4 *                             / __| | | | |_) | |
5 *                            | (__| |_| |  _ <| |___
6 *                             \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at http://curl.haxx.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ***************************************************************************/
22#include <stdio.h>
23#include <string.h>
24#include <curl/curl.h>
25
26/* This is a simple example showing how to verify an email address from an
27 * SMTP server.
28 *
29 * Notes:
30 *
31 * 1) This example requires libcurl 7.34.0 or above.
32 * 2) Not all email servers support this command and even if your email server
33 *    does support it, it may respond with a 252 response code even though the
34 *    address doesn't exist.
35 */
36
37int main(void)
38{
39  CURL *curl;
40  CURLcode res;
41  struct curl_slist *recipients = NULL;
42
43  curl = curl_easy_init();
44  if(curl) {
45    /* This is the URL for your mailserver */
46    curl_easy_setopt(curl, CURLOPT_URL, "smtp://mail.example.com");
47
48    /* Note that the CURLOPT_MAIL_RCPT takes a list, not a char array  */
49    recipients = curl_slist_append(recipients, "<recipient@example.com>");
50    curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, recipients);
51
52    /* Perform the VRFY */
53    res = curl_easy_perform(curl);
54
55    /* Check for errors */
56    if(res != CURLE_OK)
57      fprintf(stderr, "curl_easy_perform() failed: %s\n",
58              curl_easy_strerror(res));
59
60    /* Free the list of recipients */
61    curl_slist_free_all(recipients);
62
63    /* Curl won't send the QUIT command until you call cleanup, so you should
64     * be able to re-use this connection for additional requests. It may not be
65     * a good idea to keep the connection open for a very long time though
66     * (more than a few minutes may result in the server timing out the
67     * connection) and you do want to clean up in the end.
68     */
69    curl_easy_cleanup(curl);
70  }
71
72  return 0;
73}
74