environment:
Windows 2003 server, IIS 6
xoops 2.0.15

Installed from scratch and most works ok. However, trying to register a new user gives the following error message after clicking on Finish:

You are now registered. However, we were unable to send the activation mail to your email account due to an internal error that had occurred on our server. We are sorry for the inconvenience, please send the webmaster an email notifying him/her of the situation.

any idea what needs to be changed to make it work or how to get a bit more information on the error?

Thanks,
Hans