Hi Andrew,
This is not a major issue, but just to continue the converation...
"What's the difference between clearing this queue and your Outlook "Sent Items" Folder?"
Outlook does not delete the messages, it moves them to a "deleted" folder.
Of course if you delete the contents of that folder, they are truly gone.
Of course, in the real world, you will need to find an e-mail exactly one day after clearing.
