Okay, thanks to all of you experts (regarding to Intensive HD accessing problem), We got our server moved to a new one smoothly (Thanks to Chand Deshwal). It's even harder to configure MS Mail connectors ;) both ways. And moving all the 9 gigs mailboxes that took a whole day. Next, I'm planning to create a new configuration that's I think will be more efficient on system failure. Once I learn this from an ISP with Qmail on freeBSD. They put one Server for Qmail system, and another one exclusively for the mailboxes. So that if the system goes wrong, they just replace the server without having to move the mailboxes. Is it can be happen on MS Exchange (Especially ver. 5.5, that we use) ? If so, what's the critical point to this configuration. Regards, Arief K