If the code is running server side then CDO would be installed if the
Exchange management tools are installed and server side CDO 1.21 is not
subject to the security. Only client side CDO (from the Office CD) is
subject to security.

Just to get my head around this - are you saying there are two flavours of
CDO? One that's designed to run on a server and the other on a client PC?
Will the Server CDO flavour only install on a Windows Server OS or can it
install on Windows XP? The reason I ask is that we often trial our server on
a normal PC before moving it to a service in the back office.

Extended MAPI can only be programmed using C++ or Delphi. That's hurdle
#1. It's also not object oriented and is hard to learn and use. Personally
I use Redemption in my coding.

Well C++ wouldn't be totally out of the window but prefer not to. How does
Redemption resolve the security issue - does it use some other mechanism to
handle email?

Thanks, Rob.