http://www.outlook-tips.net/howto/delete_rr.htm might be what you are after.
"Pete8080" <(E-Mail Removed)> wrote in message
news:C457312E-52FB-4928-A7F9-(E-Mail Removed)...
> how do I find and get rid of an email confirmation of receipt that’s
> stuck in
> Outlook somewhere? The problem was caused by my accidently hitting "send"
> but unfortunately the original came via a server that I don’t directly
> log on
> to. Please don’t say contact my ISP – they’re the ones that can’t
> keep my
> broadband going all the time and want me to use a revenue generating phone
> number to speak to them.