outbox item stalled other messages can't send;can't delete item

N

NW1000

A single mail item has been stuck in my outbox for three days. Other
outbound messages are getting stuck behind it. I can receive messages, and
occasionally one of my outbound messages makes it out, but the stuck message
is slowing things down tremendously. I cannot delete it. When I try to open
it, it get the message "Outlook has already begun transmitting." If anyone
knows how to remove a message from behind the scenes, I'd appreciate the help.
Thank you.
 
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