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

       Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO

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