NAME

       CURLOPT_MAIL_AUTH - SMTP authentication address

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_MAIL_AUTH, char *auth);

DESCRIPTION

       Pass  a pointer to a zero terminated string as parameter. This will be used to specify the
       authentication address (identity) of a submitted message that is being relayed to  another
       server.

       This optional parameter allows co-operating agents in a trusted environment to communicate
       the authentication of individual messages and should  only  be  used  by  the  application
       program,  using  libcurl,  if  the  application  is itself a mail server acting in such an
       environment. If the application is operating as such and the AUTH address is not known  or
       is invalid, then an empty string should be used for this parameter.

       Unlike  CURLOPT_MAIL_FROM(3) and CURLOPT_MAIL_RCPT(3), the address should not be specified
       within a pair of angled brackets (<>). However, if an empty string is used then a pair  of
       brackets will be sent by libcurl as required by RFC2554.

DEFAULT

       NULL

PROTOCOLS

       SMTP

EXAMPLE

       TODO

AVAILABILITY

       Added in 7.25.0

RETURN VALUE

       Returns   CURLE_OK   if   the   option  is  supported,  CURLE_UNKNOWN_OPTION  if  not,  or
       CURLE_OUT_OF_MEMORY if there was insufficient heap space.

SEE ALSO

       CURLOPT_MAIL_FROM(3), CURLOPT_MAIL_RCPT(3),