Dear All, We have a slight problem on exchange 2003. We developped a synchronisation tool for webmail to certain devices and we want to stop the device users to send out email to the internet (without getting error's) while that is done by the tool we have... We host other users on that server too, that are allowed to send email. How can that be done in exchange 2003? Anyone have a solution for this? Thanks in advance, Best regards, Kees Sybesma System Administrator GPXS