Basis data: Vista Home Premium OS, Dual Core processors (2.67 GHz), 4 GB Ram, purchased AVG antivirus behind Wireless (WP2) router with Qwest DSL. I use Outlook (from Office 2003) with Yahoo as my POP3/SMTP service.
A week ago I created an email that was too big (62MB). Rather than canceling, I accidentally hit send (honest...

). I've been trying to delete it ever since. I extended timeout times, just in case. After very long process time (5 min+) I get this error message:
"Task 'xxxxx - Sending' reported error (0x800ccc0f): 'The connection to the server was interrupted. If this problem continues, contact your server administrator, or Internet Service provider (ISP). The server responded: 451 timeout (#4,4,4)'"
But then, if I try to delete from the opened outbox, I get an Outlook error stating:
"Can't open this item. Outlook has already begun transmitting this message."
It's stuck there.
OK, so another thing I have to admit... I previously had a problem with automatic read-receipts hanging up in my send process, so I used mdbvu32.exe to delete them. So, I thought... maybe I can use that to delete this bad-boy from my Outbox... Bad thinking.
What have I failed to tell you that can help you tell me how get rid of this elephant?