I've had similar problems using CDONTS in Win2K...more often than not, just verify that the SMTP service is in fact running and that CDONTS has been registered for IIS 5.0, at c:\WINNT\system32\cdonts.dll
Also, here's the generic syntax for a CDONTS.NewMail message:
========================== EMAIL.ASP =====================
<%
' DECLARE VARIABLES AND INSTANTIATE THE newmail OBJECT
Dim objMailMessage
Set objMailMessage = Server.CreateObject("CDONTS.NewMail"
' FORMAT THE newmail MESSAGE
objMailMessage.to = "recipient@domain.com"
objMailMessage.from = "sender@domain.com"
objMailMessage.cc = "someone@domain.com"
objMailMessage.bcc = "someoneelse@domain.com"
objMailMessage.subject = Testing CDONTS
objMailMessage.bodyformat = 0 ' 0 for HTML, 1 for plaintext (default)
objMailMessage.body = "<h1>This is an APB for you...<font face=Verdana color=#005522>CDONTS.NewMail</font> has been installed and is working fine. You'll thank me later.</h1><h3>Love,<br><a href='mailto:sender@domain.com'>Your friend</a></h3>"
objMailMessage.Importance = 2
' SEND THE MAIL MESSAGE TO ITS RECIPIENTS
objMailMessage.Send()`
' DEREFERNCE THE OBJECT AND DESTROY ITS INSTANCE
Set objMailMessage = Nothing
%>
======================================================
If this doesn't work...then what error message are you getting?