I am about to install Postfix on one of my linux machines in order to act as a gateway for my Exchange servers. I have done this before, so I don't expect too much trouble there. But I do want to try something different this time, and am hoping this is possible. By default, I just want to forward all mail for a certain domain to Exchange server A, but when needed, I would like all mail for certain users to go to Exchange server B. example: [email protected] [email protected] Is this something that can be done? Thanks!