>>Looks like you're using CDO 2000 where Send() method doesn't have any parameters. See http://msdn2.microsoft.com/en-us/library/ms526482.aspx. It's up to SMTP server to store or not copies of the messages.
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>Right you are about send(). Thanks. But I don't understand why when I use outlook express (or Outlook Web for that matter) to send a manually entered email, our institution's email server puts a copy of the email into my sent-mail folder. But when I do it programmatically with CDO, it doesn't.

It may be done by mail client (OE or Outllok) not by server.