Hi Ralph,
The Queue can be sorted by Status, Date and Customer:

Multi-select is available to delete a whole series of entries.
The report can be printed to AdagioPDF, and report options allow you to isolate the entries you are about to delete:

Entries that are in the queue can be resent (to another e-mail address if necessary.
What's the difference between clearing this queue and your Outlook "Sent Items" Folder?