I would like to use an Outbound Gateway for all mail destined to the Internet, but I would like to connect directly for messages heading to another internal mail domain (which is hosted on an Exchange server).   I cannot find any way to bypass the outbound gateway, but it seems like this should not be an unusual request.

 

Sender priorities don't work because I want to route based on the recipient address, not the senders address.

 

The options I know how to configure are (a) never use the outbound gateway, or (b) always use the outbound gateway.