How is Apache on XP? I was using Apache on my Linux box for a bit... I liked it, but Linux is a pain to 'figure. I'm using IIS right now on my XP Pro machine, however, it's IIS Professional, which only allows for 10 simultanious connections. I am thinking about getting a server edition. I do like that you can run your own SMTP server, though.
On each of my email accounts I have the SMTP server set up as 127.0.0.1 rather than my ISP's server. 🙂