OK, I know you won't believe me, but my friend did this.
My friend sent two emails with attachments over 500Mbs on each. Don't ask me why.
Now, Outlook 2003 won't send them, or it is trying and taking forever. I am trying to delete the emails or stop them or move them, but I continue to get the error message "Outlook is in the process of sending the emails."
I tried to delete them in Safe Mode, but it said the same thing.
Even if I shut down Outlook with the Options set for not sending, it seems to try to send anyway or start where it left off.