I'm about to try Scalix. We've never used Exchange or any other collaboration platform, so this is all uncharted territory for me.
I've got Sendmail sitting on Server A and Server B, getting mail from the outside world and funneling it over to Server C. Server C is where all of my users log in, and I've got Dovecot running there so they can POP3 in and retrieve their email. Server C is also my outbound Sendmail server. Call it excessive paranoia on my part, but this way there's no port open from the outside world directly to Server C.
So where should my Scalix server go? A, B, C, or another server altogether? I can make a case for any of them, I think - but then again, I'm not sure of what I'm doing.
Thanks for any helpful advice...