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