Changes needed when using SMTP Relay Server for AntiSpam service?

Hi,

I want to start evaluating Brightmail AntiSpam 6. This package will be installed on a seperate Windows 200x server and it needs the Windows SMTP service. I have to configure this as a SMTP Relay Server. So all inbound SMTP mail will be delivered to this computer then. Now the Notes server is accepting all the internet mails.

I will setup the Windows SMTP service to forward all the mails to a smart host. (My Notes server I assume). Do I have to change anything in my Notes config? Or will it accept all the mails from this smart host anyway?

[Firwall] -->>-- [Brightmail with SMTP Relay setup] -->>-- [ Existing Lotus Notes Server]

Btw: Is anybody using Brightmail 6.0?