NAME

       CURLOPT_SASL_IR - send initial response in first packet

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SASL_IR, long enable);

DESCRIPTION

       Pass a long. If the value is 1, curl sends the initial response to the server in the first authentication
       packet  in  order to reduce the number of ping pong requests. Only applicable to the following supporting
       SASL authentication mechanisms:

       * Login * Plain * GSSAPI * NTLM * OAuth 2.0

       Note: Whilst IMAP supports this option there is no need to explicitly set it, as  libcurl  can  determine
       the feature itself when the server supports the SASL-IR CAPABILITY.

DEFAULT

       0

PROTOCOLS

       This functionality affects imap and smtp

EXAMPLE

       int main(void)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           CURLcode res;
           curl_easy_setopt(curl, CURLOPT_URL, "smtp://example.com/");
           curl_easy_setopt(curl, CURLOPT_SASL_IR, 1L);
           res = curl_easy_perform(curl);
           curl_easy_cleanup(curl);
         }
       }

AVAILABILITY

       Added in curl 7.31.0

RETURN VALUE

       curl_easy_setopt(3) returns a CURLcode indicating success or error.

       CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3).

SEE ALSO

       CURLOPT_MAIL_AUTH(3), CURLOPT_MAIL_FROM(3), CURLOPT_SASL_AUTHZID(3)

libcurl                                            2025-03-05                                 CURLOPT_SASL_IR(3)