Mailing List List-Id Header

[Esben Stien]

Is there supposed to be a List-Id in the headers of email that comes
from
this mailing list?

I don't see any. Any other headers you use?

[Reindl Harald]

Is there supposed to be a List-Id in the headers of email that comes from
this mailing list?
I don't see any. Any other headers you use?

List-Id: systemd Development Mailing List
<systemd-devel.lists.freedesktop.org>

mostly you looked at one the famous "reply-all" instead "reply-list"
messages which did not go over the list at all because people find it
funny break threading and reply-buttons for others