fix #4162: sys: added auto-submitted header to email body

`Auto-Submitted` is defined in the rfc 5436 [1] and describes how
an automatic response (f.e. ooo replies, etc.) should behave on the
emails. When using `Auto-Submitted: auto-generated` (or any value
other than `none`) automatic replies won't be triggered.

[1]: https://www.rfc-editor.org/rfc/rfc3834.html

Signed-off-by: Gabriel Goller <g.goller@proxmox.com>
This commit is contained in:
Gabriel Goller 2023-09-08 15:06:57 +02:00 committed by Thomas Lamprecht
parent 359da67e9b
commit bcdcb181ee

View File

@ -7,6 +7,8 @@ use anyhow::{bail, Error};
/// Sends multi-part mail with text and/or html to a list of recipients
///
/// Includes the header `Auto-Submitted: auto-generated`, so that auto-replies
/// (i.e. OOO replies) won't trigger.
/// ``sendmail`` is used for sending the mail.
pub fn sendmail(
mailto: &[&str],
@ -69,6 +71,7 @@ pub fn sendmail(
body.push_str("This is a multi-part message in MIME format.\n");
let _ = write!(body, "\n--{}\n", boundary);
}
body.push_str("Auto-Submitted: auto-generated;\n");
if let Some(text) = text {
body.push_str("Content-Type: text/plain;\n");
body.push_str("\tcharset=\"UTF-8\"\n");