We are using Exchange 2000 server on a W2K Server with all latest service packs installed and what is happening is when mail is sent it gets stuck in the outbox and the mapisp32 stops responding this only happens on windos 98 machines with outlook 98 installed some machines have outlook 2000 on them and this does not happen I have already triied uninstalling and reinstalling the exchange server and this seemd to work however the problem has returned what is going on someone plase help me