I have a Mailscanner box I am using as a frontend to Exchange. One of the domains I host uses MX-Logic to scan inbound and also as a smart-host. I realize that in Exchange 2010 I can create a transport rule that would forward outbound mail from those users directly to MX Logic for delivery. I do like to use the Mailscanner to troubleshoot mailflow as its interface is better than Exchange.
Is there a code I can put in the postfix config like "relayhost = mail.domain.com" that would seperate by outgoing domains?