Hi David.

Interesting... Had no idea that CDO used OE's setup. Thanks.

From the MSDN Library on the Configuration coClass:

In many cases, the default configuration settings are sufficient to send and post messages successfully. The default configuration settings depend on the software installed on the computer on which you are using the CDO component. When you send messages without associating a Configuration object, these defaults are used; for example, if the computer has the SMTP service installed, the default configuration for sending messages is to write them into files in the SMTP pickup directory. Additionally, various settings can be loaded from Microsoft® Outlook® Express if it is installed. For more information about default settings, see the configuration fields section of the reference.

Depending on the software installed, the default operations are summarized in the following table.

CDO Default Configuration Hierarchy

Software installed Defaults loaded from
------------------------------------------ ----------------------------------------------
CDO for Windows 2000, Outlook Express Default mail account
CDO for Windows 2000, IIS SMTP and Network News Transfer Protocol (NNTP) sites
CDO for Windows 2000, IIS, Outlook Express Microsoft Internet Information Server (IIS) and Outlook Express (sends messages through IIS pickup directory)