Dear Maintainer, After trying out dbus-user-session, kmail regularly loose connection to his backend when switching users. Only workaround is to remove dbus-user-session for now. Alexandre Detiste Kernel: Linux 3.19.0-trunk-amd64 (SMP w/6 CPU cores) Locale: LANG=fr_BE.UTF-8, LC_CTYPE=fr_BE.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system)