On 2020-10-10 11:10 <to...@tuxteam.de> wrote: > I made myself quite a bit of work to explain to you what you can do. > Even with a link to mailman docs on how you can set your subscription > settings.
You did not. You wrote > experiment with setting the Mail-Followup-To: header [1] and pointed to https://cr.yp.to/proto/replyto.html The context of that "setting" is missing. I did not understand that you wrote about mailman. You do not gave enough information but an potentially insecure URL. I couldn't find a setting named "Mail-Followup-To: header" but "Avoid duplicate copies of messages?" kind
