Are you completely sure you have the feature installed?

If you haven't got the SMTP server installed, CDONTS won't be available. The one is linked to the other.

Sounds to me like you didn't install the SMTP service. If your version of windoze doesn't support the SMTP service, CDONTS will never work on it (but AFAIK, all versions of NT/ 2k do)

Don't bother copying cdonts.dll from someone else's box, that will lead to trouble. It won't be the right version, and it won't work anyway unless you have the SMTP service.