I have a W2K box that runs just the SMTP service. It's used to send out emails to a couple thousand subscribers to our reminder service a couple of times a month. These are emails put into the SMTP server's queue by a custom application that generates them. We don't actually use Exchange or anything else on this box, it's just a stand-alone unit isolated from our corporate network for safety's sake. I'm a bit of an email administration virgin, so forgive me if this is a naive question ... but if I uncheck the box in the SMTP service that allows anonymous logins, so that I'm not an open relay -- then any mail that gets sent to that box gets bounced. How do I allow emails to my own domain in, from all comers, without being an open relay? I want to catch repy-to's and bounces of the mails I'm sending. The bounce error says, "relay refused" but that wouldn't be a relay, it'd be a delivery. I've Googled around but can't find anything that addresses my scenario. --Bob