Quote from steve0617:
Respectfully, it is not suicide to run a Windows platform mail server. It's not like you're running NASA for God's sake. It's just another program and the ArgoSoft one is very easy and very stable.
And you do not HAVE to have a static IP for a server, although of course it's preferable. All of the dynamic DNS products will work just fine with a small Windows based email server.
You wouldn't run a company's Exchange server like that, but for this guy's personal home based needs, the small stuff is fine.