How Do I Delete Multiple Copies of The Same E-Mail

For some reason your server has downloaded 2,3 or more copies of the same e-mail going back months. Is there any way to delete the copies of the same e-mail while keeping the original or am I stuck with about 1,000 extra e-mails?

Unfortunately it is not possible at the moment. I am afraid, you will have to delete it manually, or leave it as it is until we implement the duplicity checker.