Hi Dennis,
- Do you need a domainname, or is an IP-address also possible ?
You can use an IP address if you like e.g.
http://66.102.9.104 for google
- SMTP server is installed, but how must I set it up ?
You can manage the smtp server via the Internet Services manager snap-in control panel -> administrative tools -> internet services manager or internet information services
Please do not cross-post.
HTH,
Chris