Delete All emails From Your IPhone Inbox

To delete all of the emails in your iPhone's inbox, follow these steps:

Open the Mail app on your iPhone.

Tap on the "Inbox" folder to view your emails.

Tap on the "Edit" button in the top-right corner of the screen.

Tap on the "Select All" button at the bottom of the screen. This will select all of the emails in your inbox.

Tap on the "Trash" icon in the bottom-right corner of the screen.

Confirm that you want to delete the selected emails.

This will delete all of the emails in your inbox and move them to the "Trash" folder. If you want to permanently delete the emails, you will need to empty the "Trash" folder as well. To do this, go to the "Trash" folder and repeat the above steps, selecting all of the emails and then tapping on the "Delete" button.