how to delete all mails in Gmail at once?
For more Gmail suggestions, see the section below. Delete the item. Confirm your action. Trash the item and repeat the procedure for any other tabs. For additional Gmail hints, see Section Below.
If your Gmail inbox has more than 100 emails on a single page, you’ll have to search and delete them in multiple steps.
Go to Gmail on your computer. Open an email from the person or company you want to stop receiving emails from. Click Unsubscribe or Modify preferences next to the sender’s name. If you don’t see them, follow the instructions above to block the sender or mark the message as spam.
Select The First 50 Emails In Gmail. Connect to your Gmail account and, at the top, click the blank square shown in the illustration below.
After that, simply delete emails from your Inbox into an archive folder. To get started, log into your Gmail inbox as you normally would. Select all messages with a little check next to the search bar. Select all conversations with the button above them. Delete all messages and empty the trash by clicking on it.