I've inherited Exchange, and I've been working on implementing a second Exchange server(2k7) and an IronPort C150. My plan is to move all the exchange users over to the new server and have the IronPort serve as the Anti-Virus/Anti-Spam. I don't have an "Edge Transport Server" configured, as I'm pretty sure the IronPort can do this. My question is how do I configure the IronPort to do this, then how to tell Exchange to look at the IronPort for this function? I've created a couple test accounts, and can send to them and reply from them internally just fine. When I send an email from one of them to outside the network, it never arrives.