---
name: "CURLOPT_MAIL_FROM"
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_MAIL_FROM"
---

# CURLOPT\_MAIL\_FROM(3)

SMTP sender address

## NAME

CURLOPT\_MAIL\_FROM - SMTP sender address

## SYNOPSIS

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

## DESCRIPTION

Pass a pointer to a null-terminated string as parameter. This should be used to specify the sender's email address when sending SMTP mail with libcurl.

An originator email address should be specified with angled brackets (\<\>) around it, which if not specified are added automatically.

If this parameter is not specified then an empty address is sent to the SMTP server which might cause the email to be rejected.

The application does not have to keep the string around after setting this option.

## DEFAULT

blank

## PROTOCOLS

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_MAIL_FROM, "president@example.com");
    res = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}
```

## AVAILABILITY

Added in 7.20.0

## 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\_AUTH**(3)](/CURLOPT_MAIL_AUTH/3.md), [**CURLOPT\_MAIL\_RCPT**(3)](/CURLOPT_MAIL_RCPT/3.md)