I have a user that, when sending out a group email with an attachment or without one, will inevitably get an email back that starts off stating "Invalid final delivery userid". That will follow with a list of addresses of some of the recepients, and then finish with the statement"[message truncated]". It appears everyone receives the email, so we have no idea what the returned email means. Our email provider is blaming Outlook 2002. I've been unable to find anything @ Microsoft on this or anywhere else.