OK, here is more exactly what happens. I put maybe a few hundred email in the trash. I did this by sorting on sender, then selecting ones from the same sender that I didn't need, and move them to trash. Now I say empty trash. And nothing happens. Maybe I did it wrong, so try again. And again. I had over 9GB of mail, which was the reason for doing this, and was getting ready to try a program that could copy between Imap systems. That is, copy all my mail to another computer. It is now obvious that it takes some time, maybe a minute or so, to empty trash. During this time, the browser doesn't respond, as it is waiting for Comcast, but still keeps track of mouse clicks. (That might count as a browser bug.) So, since I was clicking on things while it wasn't responding, is it possible that I clicked "Delete all mail", and then "Confirm"? I can't be sure that I wasn't. Until this time, I was never told about the limit to the size of Trash, and for that matter, not about the recover of deleted mail or its size. It was pretty obvious when I saw the size of exactly 5000 and 15000 messages, though, that someone was counting them. As "Delete" normally means "Move to trash", we should get an extra warning when it is more messages than fit in trash, that they will be deleted.
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