I'm very new to setting up Sendmail, but I finally feel like I'm getting the hang of things. Too small problems linger. This machine hosts multiple domains. The server's name is host.ispdomain.com. I moved mydomain.com to it, and I want every message sent to have user at mydomain.com in the headers instead of user at host.ispdomain.com. I've set the reply to addresses so without looking at the properties you can't tell. I'd like it so that when I look at the message headers I don't see any treaces of host.ispdomain.com. I think I saw it in a config file or a doc file but I forgot where it was. The second (bigger) problem is setting up the server so I can use e-mail clients such as Netscape or Outhouse. The real trick (I'm sure it's turned off by default) is that the people using POP/SMTP clients will be all over the internet so I can't filter by IP addresses. I know, I'm opening up a very nice SPAM relay but there's no good way around it that I can tell. What do I have to do to get Sendmail to accept connections from SMTP/POP e-mail clients? Thanks a lot!! -Brian