env | grep DBUS_SESSION_BUS_ADDRESS > $HOME/.Xdbus
echo 'export DBUS_SESSION_BUS_ADDRESS' >> $HOME/.Xdbus
-tmux new-session -d -s offlineimap offlineimap &
+[ $(pgrep -c offlineimap) = 1 ] || tmux new-session -d -s offlineimap offlineimap &
# Launch default desktop applications
gajim &