Re: need for open-minded help with popularity-contest with systemd timer

On 2026-08-04 Russ Allbery <[email protected]> wrote:
[...]
> This is what I've personally done with systemd services that I've wanted
> to harden by adding no-new-privileges, for example. I've switched them
> over to submitting messages via SMTP to localhost, and that's been fine
> for me. But it is worth noting that this loses information compared to
> using the sendmail interface, specifically the user the process that sent
> the email was running as.

> It also requires running an SMTP listener on localhost, which people don't
> always do on systems with stub SMTP clients. Of course for
> popularity-contest it can submit directly to Debian in the most common
> case, but a general solution to the problem would be useful.

> Ideally there would be some protocol that could trace the submitted
> message back to a user and possibly a process ID. I have wanted that
> information for practical reasons before (trying to track down which
> service was sending weird mail, for instance).

Time to revive ident / rfc 1413 ;-)

cu Andreas