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'/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
/* <DESC>
* SMTP example showing how to verify an e-mail address
* </DESC>
*/
#include <stdio.h>
#include <string.h>
#include <curl/curl.h>
/* This is a simple example showing how to verify an e-mail address from an
* SMTP server.
*
* Notes:
*
* 1) This example requires libcurl 7.34.0 or above.
* 2) Not all email servers support this command and even if your email server
* does support it, it may respond with a 252 response code even though the
* address doesn't exist.
*/
int main(void)
{
CURL *curl;
CURLcode res;
struct curl_slist *recipients = NULL;
curl = curl_easy_init();
if(curl) {
/* This is the URL for your mailserver */
curl_easy_setopt(curl, CURLOPT_URL, "smtp://mail.example.com");
/* Note that the CURLOPT_MAIL_RCPT takes a list, not a char array */
recipients = curl_slist_append(recipients, "<recipient@example.com>");
curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, recipients);
/* Perform the VRFY */
res = curl_easy_perform(curl);
/* Check for errors */
if(res != CURLE_OK)
fprintf(stderr, "curl_easy_perform() failed: %s\n",
curl_easy_strerror(res));
/* Free the list of recipients */
curl_slist_free_all(recipients);
/* Curl won't send the QUIT command until you call cleanup, so you should
* be able to re-use this connection for additional requests. It may not be
* a good idea to keep the connection open for a very long time though
* (more than a few minutes may result in the server timing out the
* connection) and you do want to clean up in the end.
*/
curl_easy_cleanup(curl);
}
return 0;
}
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