curl/docs/libcurl/opts/CURLOPT_MAIL_FROM.md
Daniel Stenberg e694c8284a
docs/libcurl/opts: clarify the return values
Expand a little.

- mention the type name of the return code
- avoid stating which exact return codes that might be returned, as that
  varies over time, builds and conditions
- avoid stating some always return OK
- refer to the manpage documenting all the return codes

Closes #15900
2025-01-02 17:13:33 +01:00

73 lines
1.6 KiB
Markdown

---
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
SPDX-License-Identifier: curl
Title: CURLOPT_MAIL_FROM
Section: 3
Source: libcurl
See-also:
- CURLOPT_MAIL_AUTH (3)
- CURLOPT_MAIL_RCPT (3)
Protocol:
- SMTP
Added-in: 7.20.0
---
# NAME
CURLOPT_MAIL_FROM - SMTP sender address
# SYNOPSIS
~~~c
#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.
Using this option multiple times makes the last set string override the
previous ones. Set it to NULL to disable its use again.
# DEFAULT
blank
# %PROTOCOLS%
# EXAMPLE
~~~c
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%
# RETURN VALUE
curl_easy_setopt(3) returns a CURLcode indicating success or error.
CURLE_OK (0) means everything was OK, non-zero means an error occurred, see
libcurl-errors(3).