quickjs-tart

quickjs-based runtime for wallet-core logic
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smtp-vrfy.c (2677B)

      1 /***************************************************************************
      2  *                                  _   _ ____  _
      3  *  Project                     ___| | | |  _ \| |
      4  *                             / __| | | | |_) | |
      5  *                            | (__| |_| |  _ <| |___
      6  *                             \___|\___/|_| \_\_____|
      7  *
      8  * Copyright (C) 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.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  * SPDX-License-Identifier: curl
     22  *
     23  ***************************************************************************/
     24 
     25 /* <DESC>
     26  * Verify an SMTP email address
     27  * </DESC>
     28  */
     29 
     30 #include <stdio.h>
     31 #include <string.h>
     32 #include <curl/curl.h>
     33 
     34 /* This is a simple example showing how to verify an email address from an
     35  * SMTP server.
     36  *
     37  * Notes:
     38  *
     39  * 1) This example requires libcurl 7.34.0 or above.
     40  * 2) Not all email servers support this command and even if your email server
     41  *    does support it, it may respond with a 252 response code even though the
     42  *    address does not exist.
     43  */
     44 
     45 int main(void)
     46 {
     47   CURL *curl;
     48   CURLcode res;
     49   struct curl_slist *recipients = NULL;
     50 
     51   curl = curl_easy_init();
     52   if(curl) {
     53     /* This is the URL for your mailserver */
     54     curl_easy_setopt(curl, CURLOPT_URL, "smtp://mail.example.com");
     55 
     56     /* Note that the CURLOPT_MAIL_RCPT takes a list, not a char array  */
     57     recipients = curl_slist_append(recipients, "<recipient@example.com>");
     58     curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, recipients);
     59 
     60     /* Perform the VRFY */
     61     res = curl_easy_perform(curl);
     62 
     63     /* Check for errors */
     64     if(res != CURLE_OK)
     65       fprintf(stderr, "curl_easy_perform() failed: %s\n",
     66               curl_easy_strerror(res));
     67 
     68     /* Free the list of recipients */
     69     curl_slist_free_all(recipients);
     70 
     71     /* curl does not send the QUIT command until you call cleanup, so you
     72      * should be able to reuse this connection for additional requests. It may
     73      * not be a good idea to keep the connection open for a long time though
     74      * (more than a few minutes may result in the server timing out the
     75      * connection) and you do want to clean up in the end.
     76      */
     77     curl_easy_cleanup(curl);
     78   }
     79 
     80   return 0;
     81 }