The last time my client uses Windows Small Business Server, I had them bought Trend Micro Client Server Messaging Security for Small and Medium Business. It was quite costly; around $1200 for 15 users includes 2 years maintenance. It made sense then, because his settings makes it easy to manage and maintain and virus protect all the PCs in the network from one centralized place. Moreover, it also has virus and anti spam for Exchange.
My new client has only Windows Exchange 2010 that’s running in data center. Having an “enterprise” (read expensive) spam and anti virus was not an option for him. The only way to cut costs is by using Linux or the likes. Alas, the client just wants Exchange somehow. So I get to think, why don’t we have Linux box running Postfix as a front-end Mail Transfer Agent (MTA) to MS Exchange 2010. Below is the diagram of what I’m trying to achieve.
So let’s get to it. I’ve broken it down to several pages. If you’d like to jump to a particular page, simply follow the links below.