Thanks for your response.
I've been talking about this on a number of other forums and it seems nearly everyone is being told from the Microsoft licensing that mail servers are outsourced.
However everything else to do with shared hosting they are saying is non-outsourced, like website, DNS, Database, etc.
The problem is that even Microsoft own Licensing Specialists don't understand the SPLA outsourced/non-outsourced licensing.
Microsoft need to sortout their SPLA licensing and stop these sudden changes otherwise people are simply going to stop using Microsoft for hosting and start using Linux instead.
Linux:
Free with simple to understand licensing with no changes
Micosft SPLA
Expensive with very confusing licensing and constant price and licensing changes with no notice
I've already been warned to expect a doubling in the price of the DataCenter version of Windows Server in January, but official word on this will not be till around 15th January. So if you are using DataCenter, like we do for virtual servers, expect a huge price rise in your licensing.