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//opt/curlssl/share/man/man3/CURLOPT_MAIL_AUTH.3

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.TH CURLOPT_MAIL_AUTH 3 "19 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
.SH NAME
CURLOPT_MAIL_AUTH \- specify SMTP authentication address
.SH SYNOPSIS
#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_MAIL_AUTH, char *auth);
.SH 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 \fICURLOPT_MAIL_FROM(3)\fP and \fICURLOPT_MAIL_RCPT(3)\fP, 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.
.SH DEFAULT
NULL
.SH PROTOCOLS
SMTP
.SH EXAMPLE
TODO
.SH AVAILABILITY
Added in 7.25.0
.SH 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.
.SH "SEE ALSO"
.BR CURLOPT_MAIL_FROM "(3), " CURLOPT_MAIL_RCPT "(3), "