Mail solution integration with cpanel?

I find MailEnable server solutions to look tight and great:
http://www.mailenable.com/

I have contacted them regarding the possible integration with cPanel as they website says:
http://www.mailenable.com/partners-control-panels.asp

They told me that it is not entirely possible anymore, as it only was possible when cPanel was offered on Windows servers.
They also said that it is a question to ask cPanel’s support about at this point.
Does anyone know the possibility of integration of MailEnable on Windows server and cPanel on CentOS or any other Linux server?

My goal here is to substitute the use of Exim and SpamAssassin and use a dedicated server to handle and route mail services for my clients.
I was looking for something that can be managed outside of WHM and still provides good integration with cPanel accounts.

Would anyone know of a server solution/software that can accomplish this? Would MailEnable be possible?

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