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+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2013, 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 http://curl.haxx.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.
+ *
+ ***************************************************************************/
+#include <stdio.h>
+#include <string.h>
+#include <curl/curl.h>
+
+/* This is a simple example showing how to verify an email address from an
+ * SMTP server.
+ *
+ * Notes:
+ *
+ * 1) That this example requires libcurl v7.34.0 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 - you can also use an smtps:// URL
+ * here */
+ curl_easy_setopt(curl, CURLOPT_URL, "smtp://mail.example.net");
+
+ /* 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;
+}