Open Outlook and go to the folder containing the emails
Select multiple emails by holding Ctrl and clicking each email you want to delete
Select a range of emails by clicking the first email, holding Shift, and clicking the last email
Press Delete on your keyboard
Right-click the selected emails and choose Delete
To delete all emails in a folder, press Ctrl+A to select all, then press Delete
To delete multiple emails on Outlook mobile, tap and hold one email, then select the others and tap Delete
To permanently remove deleted emails, empty the Deleted Items folder