I am writing this because I am about to deploy Exchange in a green pastures environment at a new client. Normally, this is the perfect time to run wild with the latest version of everything (indeed, we are using Server 2012 with Hyper-V) but I can't seem to do that with Exchange.
Here is the dilemma. I would normally deploy and Edge Transport Server at the edge to do all the anti-spam stuff, namely connection filtering using an RBL like Spamhaus. I was quite happy to learn that AV is included in Exchange 2013, but inexplicably, connection filtering is not. To add insult to injury, we can't coexist EX 2010 with 2013 until SP3 for 2010 is released...in the first quarter of 2013.
The only real solution (other than doing 3rd party anti-spam) is to deploy Exchange 2010 with an edge transport server. Wait until SP3 is released, upgrade to SP3, install EX 2013 in the spring, migrate all the mailboxes and keep the 2010 edge transport server.
How to configure an IP Block List Provider like zen.spamhaus.org in Exchange 2013 RTM?
As I type this out, I realize it is probably best just to use MX Logic. I don't want to ask them to buy another appliance and I also don't want to do double work.
If I can sell them on MX Logic (shouldn't be a problem) - would you deploy EX 2010 or 2013?