After each initialisation, a new draft EMail is generated.
 

I have the strange effect that a new (empty) email draft message is
generated each time I start my Outlook 2003. I debugged my COM Add-In
and noticed that it is generated after the Add-In is initialised and
after the call of AddinInstance_OnStartupComplete(). There is no
custom code that generates such a message. Is this a known bug or how
can I find the place that causes this email draft?

After each initialisation, a new draft EMail is generated.
 

Found the reason: http://support.microsoft.com/kb/238404/en-us
This method of retrieving the Outlook version creates a new item to
get the version. Unfortunately, the delete call doesn't work (error
that is ignored). But even with a working deletion, the folder
"deleted objects" grows after each initialisation. So this way of
getting the outlook version is not usable. I changed it by processing
the result of Application.Version.