Hi Racke, thanks for your quick mail and sorry for the late reply, didn't find time until now.
Am Thu, Dec 31, 2020 at 06:17:45PM +0100 schrieb Stefan Hornburg (Racke): > Yes, please share the part of your Nginx configuration with regards to Sympa > and your WWSympa FCGI service setup. > If you use the wwsympa wrapper, please drop it. This is probably the hint I needed. Did not find time to evaluate properly, but my config looks like the one on https://wiki.debian.org/Sympa/Nginx (I probably stole it from there :)), and I guess the line fastcgi_param SCRIPT_FILENAME $document_root/wwsympa-wrapper.fcgi; is saying that I'm indeed using the said wrapper… it will take me a few more days until I'll be able to check if updating my configuration fill fix it, but I'll send an update to the BTS… Cheers, tobi