Hi all, it seems that if I do not start the smtp service on my SBS 2K server that has the works, (ISA, Exch and AD) my Exchange mail will not go out. It works OK for a couple of days then stops. Is it not a best practice to disable that service and just open up port 25 for exchange? I guess I will need to buy a SBS server book. I have another SBS environment where my isa publishes to an internal SBS exch server and on that isa firewall I do not run the SMTP service. Any suggestions for the stand-alone config with SBS, do I need to keep the smtp service disabled and do something else? Thanks, Peter