Provide a 'Delete All' Inbox Button
I have thousands of emails in my inbox and no way that I can find to bulk delete them. It takes too long to delete them a page at a time. So the inbox continues to grow beyond a managable amount.

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Arlow Brown commented
While I will agree that we need to be able to delete Mass amounts of emails all at once I have to disagree with your choice of words in that having one button that "deleted all' would result in every email you have being deleted including any that you might actually want to keep/read but are unaware of because they are buried in the mess of junk... Instead we need to be able to select one sender highlight all from that sender and have a delete button that removes all highlighted/selected...
Also instead of only allowing us 7 emails per page give us a setting option wherein we can choose whether we want 50 100 250 or 500 emails per page instead.
This would allow us to scan through more of them faster and select all on the top and/or bottom of the page to delete them while also being able to uncheck any that we want to keep here and there as necessary before we press delete.