I really need to either upgrade my Scalix server or replace it.
It has to be:
Free Integrated with anti-spam IPv6 support optional anti-virus (processing concerns)
I don't have to be able to port mail from the Scalix to the new server. Everyone can just POP their mail.
I have read a bit about Zimbra, it comes as a tar for rhel 5. No rpm that I can find.
I also found SME, I have a LOT of questions about it, and am asking on their forum board.
Anything else out there I should look for?