Mass email deletion on iPhone email??!!

Don't get me wrong, I'm completely happy with my sleek little device. It's probably the best thing that's happened to me since I learned how to make a sandwhich. But... there is no mass deletion in email. And this "deleteone at a time" thing is crap especially when it's loading everything off gmail/yahoo onto the phone and I don't want it there. So now I have to go delete hundreds of emails and then delete them out of the trash. There may be a faster fix for this but I haven't visited forums to find out. It's annoying though. Is there a better fix for this?
 
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