A code snippet would be helpful. How are you setting the
address on the message? Also, why CDO and not Outlook?
Unless you're setting the Body property or using a custom
form, just adding an attachment with Outlook objects
shouldn't create a Winmail.dat RTF attachment.

Signature
Sue Mosher, Outlook MVP
Outlook and Exchange solutions at http://www.slipstick.com
Author of
Microsoft Outlook Programming: Jumpstart
for Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
>-----Original Message-----
>I would like to attach one or more files (mainly Word documents, pdf and tif
[quoted text clipped - 12 lines]
>for some time now and it's getting seriously uncomfortable. (I'm using
>Outlook 2000 in IMO mode and CDO 1.21).