Samsung Contact

Now that Samsung has revived support for HP’s Openmail, I believe we will use it as an alternative to Exchange.
Currently we have our email outsourced on Exchange 2000, and are seriously considering moving it in house. Current infrastructure is Windows NT 4.0, not Server 2000 with AD.

Instead of revamping the entire infrastructure, we can bring up a LINUX box and install Contact.

What are your thoughts/suggestions on this?