My boss has asked me design a Exchange implamentation for 1000+ users, with the ability to also become an ASP.

My question was Why exchange. Therefore I am now looking to open source to design a different solution.

Looking at two BL460 Servers with SAN Connection. Using an external spam Filter and Virus Scanner.

Archive to an EMC Centerra.

Running RedHat OS.

With Zimbra, do I have the same worries as Exchange?

I would like to start this forum thread and pick everyones brains.