>The app I am supporting uses CDO mail, which works fine. I have recently added FoxyPreviewer for reports, and it works well. I am, however, having a problem with the emailing system, also using CDO. I use all the same login details, etc, that the built in CDO system uses in the rest of the app, but Foxy doesn't like it. Anyone had similar experience?

There are at least 3 different types of CDO. AFAIK, FoxyPreviewer use CDO 2000. Which one you use?