1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
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 https://curl.haxx.se/docs/copyright.html.
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.
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
21 ***************************************************************************/
24 * SMTP example showing how to expand an e-mail mailing list
30 #include <curl/curl.h>
32 /* This is a simple example showing how to expand an e-mail mailing list.
36 * 1) This example requires libcurl 7.34.0 or above.
37 * 2) Not all email servers support this command.
44 struct curl_slist *recipients = NULL;
46 curl = curl_easy_init();
48 /* This is the URL for your mailserver */
49 curl_easy_setopt(curl, CURLOPT_URL, "smtp://mail.example.com");
51 /* Note that the CURLOPT_MAIL_RCPT takes a list, not a char array */
52 recipients = curl_slist_append(recipients, "Friends");
53 curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, recipients);
55 /* Set the EXPN command */
56 curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "EXPN");
58 /* Perform the custom request */
59 res = curl_easy_perform(curl);
61 /* Check for errors */
63 fprintf(stderr, "curl_easy_perform() failed: %s\n",
64 curl_easy_strerror(res));
66 /* Free the list of recipients */
67 curl_slist_free_all(recipients);
69 /* Curl won't send the QUIT command until you call cleanup, so you should
70 * be able to re-use this connection for additional requests. It may not be
71 * a good idea to keep the connection open for a very long time though
72 * (more than a few minutes may result in the server timing out the
73 * connection) and you do want to clean up in the end.
75 curl_easy_cleanup(curl);