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Annotation of embedaddon/curl/docs/examples/smtp-vrfy.c, revision 1.1.1.1

1.1       misho       1: /***************************************************************************
                      2:  *                                  _   _ ____  _
                      3:  *  Project                     ___| | | |  _ \| |
                      4:  *                             / __| | | | |_) | |
                      5:  *                            | (__| |_| |  _ <| |___
                      6:  *                             \___|\___/|_| \_\_____|
                      7:  *
                      8:  * Copyright (C) 1998 - 2019, 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 https://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: 
                     23: /* <DESC>
                     24:  * SMTP example showing how to verify an e-mail address
                     25:  * </DESC>
                     26:  */
                     27: 
                     28: #include <stdio.h>
                     29: #include <string.h>
                     30: #include <curl/curl.h>
                     31: 
                     32: /* This is a simple example showing how to verify an e-mail address from an
                     33:  * SMTP server.
                     34:  *
                     35:  * Notes:
                     36:  *
                     37:  * 1) This example requires libcurl 7.34.0 or above.
                     38:  * 2) Not all email servers support this command and even if your email server
                     39:  *    does support it, it may respond with a 252 response code even though the
                     40:  *    address doesn't exist.
                     41:  */
                     42: 
                     43: int main(void)
                     44: {
                     45:   CURL *curl;
                     46:   CURLcode res;
                     47:   struct curl_slist *recipients = NULL;
                     48: 
                     49:   curl = curl_easy_init();
                     50:   if(curl) {
                     51:     /* This is the URL for your mailserver */
                     52:     curl_easy_setopt(curl, CURLOPT_URL, "smtp://mail.example.com");
                     53: 
                     54:     /* Note that the CURLOPT_MAIL_RCPT takes a list, not a char array  */
                     55:     recipients = curl_slist_append(recipients, "<recipient@example.com>");
                     56:     curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, recipients);
                     57: 
                     58:     /* Perform the VRFY */
                     59:     res = curl_easy_perform(curl);
                     60: 
                     61:     /* Check for errors */
                     62:     if(res != CURLE_OK)
                     63:       fprintf(stderr, "curl_easy_perform() failed: %s\n",
                     64:               curl_easy_strerror(res));
                     65: 
                     66:     /* Free the list of recipients */
                     67:     curl_slist_free_all(recipients);
                     68: 
                     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.
                     74:      */
                     75:     curl_easy_cleanup(curl);
                     76:   }
                     77: 
                     78:   return 0;
                     79: }