search for: openupload

I need to setup something for a group of CAD guys to provide a web interface for clients/customers to send files to them. I was hoping to have an interface where the customer would be given a logon and it would email a link to the employee upon his successful upload. This would require an internal facing site to provision a slot to give to a customer. Anyone know of a project like this so I

Just wondering if there's an open source Linux alternative to MS Exchange so that all the features of outlook work?