I've been bugging you guys for quite some time for some way to delete most of my messages, but not all of them. Currently, what I have to do is a "delete multiple," and then check off all of the very many messages I want to delete, skipping over the very few I want to save. It would be really nice if there were an interface that made it easier to do this. Here are some approaches you might consider:

"Delete all unpinned." That would allow me to use the "pin to top" feature on all the messages I want to retain, and delete everything else with one command. I've suggested this before and you've rejected it, but it seems to me like a very intuitive extension of the pin feature.

"Check all." In the "delete multiple" screen, a single button which turns on all of the check boxes. Then I'd just have to un-check the ones I want to keep. Many, many interfaces involving check boxes have a feature like that.

"Invert selection." Along similar lines, in the "delete multiple" screen, a button which un-checks all the currently checked boxes, and checks all the currently unchecked ones. Again, that way I could just identify the messages I want to keep, not the ones I want to delete.

I use text messaging to notify me of important events: certain emails, changes to certain web pages, that sort of thing. The result is that my inbox is constantly filled with a lot of crap. And then I also use them for ordinary stuff like communicating with my wife. So the idea here is that I'd like a quick, easy way to get rid of all the crap, while retaining the messages with my wife and a couple of other people. I can't possibly be the only user who would find this useful.