Steps to mass delete emails on Gmail
- Step 1: Check the box on the top left to select all the messages on a mail category.
- The first 50 recent mails will be selected.
- Click on the blue text next to it to select all mails available.
- Step 2: Click the trash bin, choose OK. All the selected mails will be transferred to Trash mails category.
- Step 3: Go to Trash category, do the same action to delete them permanently.
Result: All those mails are gone.