I am a web developer and my boss is leaving in a couple months. Recently I have been taking over most of the server administration for him. I received a request from a colleague to add the 55.555.55.555 /24 (bogus ip on purpose) network to the be able to send E-mail through the SMTP server on our mail server. I can tell you that we use smarter mail and iis. Normally I would ask him what to do, but he is making me try to figure it out on my own. I have been researching things for a while now and I have idea where to begin. Can anyone give me some pointers and just general insight as I am brand new to all of this. I can also tell you we don't use the smtp server thing in IIS it is disabled. Thanks,