herman
config setprop zarafa-server GlobalForward disabled
Did you follow that with the appropriate commands to instigate that change ?
I don't use zarafa, but these should cover all possibilities (theoretically only the post-upgrade and reboot should be necessary but as I don't use zarafa the other commands may be needed, it won't hurt to issue them as well).
config setprop zarafa-server GlobalForward disabled
/etc/e-smith/events/actions/qmail-update-user
/etc/e-smith/events/actions/zarafa-create-user
/etc/e-smith/events/actions/zarafa-update
signal-event post-upgrade
signal-event reboot
Alternatively if that does not achieve the result required, then
config delprop zarafa-server GlobalForward
(which will remove the db entry and the default value will be applied by the post upgrade command)
/etc/e-smith/events/actions/qmail-update-user
/etc/e-smith/events/actions/zarafa-create-user
/etc/e-smith/events/actions/zarafa-update
signal-event post-upgrade
signal-event reboot