---
name: "CURLOPT_SASL_AUTHZID"
section: "3"
platform: "macos"
package: "curl"
version: "166.0.0.0.1"
release: "macOS 26.5"
platforms: ["linux", "macos"]
url: "https://new.carta.tech/CURLOPT_SASL_AUTHZID"
---

# CURLOPT\_SASL\_AUTHZID(3)

authorization identity (identity to act as)

## NAME

CURLOPT\_SASL\_AUTHZID - authorization identity (identity to act as)

## SYNOPSIS

```
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SASL_AUTHZID, char *authzid);
```

## DESCRIPTION

Pass a char pointer as parameter, which should be pointing to the null-terminated authorization identity (*authzid*) for the transfer. Only applicable to the PLAIN SASL authentication mechanism where it is optional.

When not specified only the authentication identity (*authcid*) as specified by the username is sent to the server, along with the password. The server derives a *authzid* from the *authcid* when not provided, which it then uses internally.

When the *authzid* is specified, the use of which is server dependent, it can be used to access another user's inbox, that the user has been granted access to, or a shared mailbox for example.

## DEFAULT

blank

## PROTOCOLS

IMAP, LDAP, POP3 and SMTP

## EXAMPLE

```
int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    curl_easy_setopt(curl, CURLOPT_URL, "imap://example.com/");
    curl_easy_setopt(curl, CURLOPT_USERNAME, "Kurt");
    curl_easy_setopt(curl, CURLOPT_PASSWORD, "xipj3plmq");
    curl_easy_setopt(curl, CURLOPT_SASL_AUTHZID, "Ursel");
    res = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}
```

## AVAILABILITY

Added in 7.66.0. Support for OpenLDAP added in 7.82.0.

## RETURN VALUE

Returns CURLE\_OK if the option is supported, and CURLE\_UNKNOWN\_OPTION if not.

## SEE ALSO

[**CURLOPT\_PASSWORD**(3)](/CURLOPT_PASSWORD/3.md), [**CURLOPT\_USERNAME**(3)](/CURLOPT_USERNAME/3.md), [**CURLOPT\_USERPWD**(3)](/CURLOPT_USERPWD/3.md)