The place I work at is currently using Postfix/Dovecot on CentOS 6 for our mail. We will be migrating to Exchange 2013 on Windows Server 2012 in the future. I have been put in charge of this task and I (obviously) would like the migration to go as smooth as possible.
The problem is, there doesn't seem to be much documentation for such a migration. At least, not with Exchange 2013. That being said, I have a couple questions.
I would like to keep our current mail server as a relay host, as it has a spam filter on it that we like. To my understanding, if I want to accomplish this, all I need to do is add this line to my main.cf:
relayhost = ExchangeServer.domain.com
Then add the mail server as a trusted server in exchange. Is that correct?
My other question is; is there any way to keep all my users email? From my research, it was possible in Exchange 2003 and 2007. But it does not appear to be directly possible with Exchange 2013 without purchasing an enterprise solution, which I would like to avoid.
I see from this post that imapsync may be a viable option. But, my understanding is that that tool doesn't work for exchange (also it's a paid solution).
Any help is appreciated.