1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2014, 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 http://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 #include <curl/curl.h>
26 /* This is a simple example showing how to send mail using libcurl's SMTP
27 * capabilities. For an exmaple of using the multi interface please see
30 * Note that this example requires libcurl 7.20.0 or above.
33 #define FROM "<sender@example.org>"
34 #define TO "<addressee@example.net>"
35 #define CC "<info@example.org>"
37 static const char *payload_text[] = {
38 "Date: Mon, 29 Nov 2010 21:54:29 +1100\r\n",
40 "From: " FROM "(Example User)\r\n",
41 "Cc: " CC "(Another example User)\r\n",
42 "Message-ID: <dcd7cb36-11db-487a-9f3a-e652a9458efd@rfcpedant.example.org>\r\n",
43 "Subject: SMTP example message\r\n",
44 "\r\n", /* empty line to divide headers from body, see RFC5322 */
45 "The body of the message starts here.\r\n",
47 "It could be a lot of lines, could be MIME encoded, whatever.\r\n",
52 struct upload_status {
56 static size_t payload_source(void *ptr, size_t size, size_t nmemb, void *userp)
58 struct upload_status *upload_ctx = (struct upload_status *)userp;
61 if((size == 0) || (nmemb == 0) || ((size*nmemb) < 1)) {
65 data = payload_text[upload_ctx->lines_read];
68 size_t len = strlen(data);
69 memcpy(ptr, data, len);
70 upload_ctx->lines_read++;
81 CURLcode res = CURLE_OK;
82 struct curl_slist *recipients = NULL;
83 struct upload_status upload_ctx;
85 upload_ctx.lines_read = 0;
87 curl = curl_easy_init();
89 /* This is the URL for your mailserver */
90 curl_easy_setopt(curl, CURLOPT_URL, "smtp://mail.example.com");
92 /* Note that this option isn't strictly required, omitting it will result in
93 * libcurl sending the MAIL FROM command with empty sender data. All
94 * autoresponses should have an empty reverse-path, and should be directed
95 * to the address in the reverse-path which triggered them. Otherwise, they
96 * could cause an endless loop. See RFC 5321 Section 4.5.5 for more details.
98 curl_easy_setopt(curl, CURLOPT_MAIL_FROM, FROM);
100 /* Add two recipients, in this particular case they correspond to the
101 * To: and Cc: addressees in the header, but they could be any kind of
103 recipients = curl_slist_append(recipients, TO);
104 recipients = curl_slist_append(recipients, CC);
105 curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, recipients);
107 /* We're using a callback function to specify the payload (the headers and
108 * body of the message). You could just use the CURLOPT_READDATA option to
109 * specify a FILE pointer to read from. */
110 curl_easy_setopt(curl, CURLOPT_READFUNCTION, payload_source);
111 curl_easy_setopt(curl, CURLOPT_READDATA, &upload_ctx);
112 curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
114 /* Send the message */
115 res = curl_easy_perform(curl);
117 /* Check for errors */
119 fprintf(stderr, "curl_easy_perform() failed: %s\n",
120 curl_easy_strerror(res));
122 /* Free the list of recipients */
123 curl_slist_free_all(recipients);
125 /* curl won't send the QUIT command until you call cleanup, so you should be
126 * able to re-use this connection for additional messages (setting
127 * CURLOPT_MAIL_FROM and CURLOPT_MAIL_RCPT as required, and calling
128 * curl_easy_perform() again. It may not be a good idea to keep the
129 * connection open for a very long time though (more than a few minutes may
130 * result in the server timing out the connection), and you do want to clean
133 curl_easy_cleanup(curl);