Using Outlook Spy.
Refer here:
http://www.outlook-tips.net/howto/delete_rr.htm
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Bill R
"Mark" <(E-Mail Removed)> wrote in message
news:F4328F24-2798-49CE-B9AD-(E-Mail Removed)...
>I use several accounts with outlook. I have one read receipt that is
>trying
> to be sent, but it can't be sent because there is a problem with the POP
> server. Is there a way I can delete this read receipt? I notice the read
> receipts don't go to the OUTBOX, so I can't delete them from there. Where
> do
> I delete read receipts that are having problems being sent?
> --
> Mark