CDONTS stands for 'Collaboration Data Objects for Windows NT Server' and as the name suggest it is for NT, sorry Win9x users you don't have this component. The CDONTS component is installed when you install IIS on NT4 and Windows 2000. Although the component will run on Windows XP, Microsoft have decided to remove the component from IIS 5.1 on Windows XP, so you will have to track down a copy of the cdonts.dll and register it on the IIS web server.

To use this component to send e-mail you also need the SMTP Server that ships with IIS 4 or 5 installed on the web server. The SMTP server is usually installed by default with the standard IIS installation.

ref-URL: http://www.webwizguide.com/asp/tutor...s_tutorial.asp