We are replacing our Exchange 2003 servers with Exchange 2007. Currently I have an Exchange 2003 server with Postini handling our spam and antivirus scanning. I have configured three Exchange 2007 Servers, one clustered Mailbox server, one disaster recover server that uses SCR replication to duplicate the Exchange server, and one client access server that is also the hub transport server.
My biggest confuision (sorry I am new) is the difference between the forefront application and and edge transport server? It seems that they both do Antispam, virus protection, phishing filters etc? Why would you choose to deploy one over the other? Also, we currently have Postini to do AntiSpam and Antivirus. The solution works well except for the staff time we have to spend going through the message logs and freeing up false positives. How would Postini rate compared to the other two options?
What I am considering doing is configuring the hub transport servers as internet facing hub transport servers and leaving Postini for now. This would be one less thing to change, then eventually I want to use the Microsoft technologies-I just don't know which one!