How to delete all your emails on Gmail, or mass-delete a specific amount of emails at once

To mass-delete all your emails on Gmail, click the "Select" box, then "Select all conversations." Or you can choose specific ...
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Is Your Gmail Inbox a Mess? Use These 3 Tricks to Fix It Fast

From the cog icon in the upper right side of Gmail's dashboard, click 'See All Settings.' Select Filters and Blocked ...