- Step 1:Unlock your iPhone and open the Mail application.
- Step 2:Now, select the folder you want to empty and open it.
- Step 3:If you are choosing the Inbox folder, touch the Edit option at the top-right corner of the screen.
- Step 4:Now, tap the first email on the folder.
- Step 5:Touch and hold the email messages to select them. Now, tap the Move option at the bottom of your screen.
- Step 6:While holding the Move option, touch the email messages you have previously selected. Now, the messages will be deselected.
- Step 7:Now, release the Move option.
- Step 8:All the folders of your email account will be displayed.
- Step 9:If you are selecting all your messages, it may take more time to view all your email messages.
- Step 10:Once you have chosen all the emails you want to remove, touch the Trash folder.
- Step 11:Now, you can view all your deleted emails in the Trash folder.
- Step 12:You can now tap Clear to empty all the deleted emails.
- Step 13:Once you have done "delete all Emails at Once on iPhone", you won’t be able to retrieve those emails back.