KDE-Kontact unable to send E-Mail. Failed to get D-Bus interface of mailfilteragent

Hello To my surprise, I am not able to send E-Mail using Kontact. I tried akonadictl restartseveral times as well as rebooting, no effect. I am running NixOS and believe I am on the newest stable channel: # nix-channel --list nixos https://channels.nixos.org/nixos-26.05 Receiving works. These are the kontakt related packages i have installed: pkgs.kdePackages.kontact pkgs.kdePackages.akonadiconsole pkgs.kdePackages.kcalc pkgs.kdePackages.kmail-account-wizard I looked around in ako...