Unfortunately no. The option to save an email simply doesn't exist in the web version of Outlook. There are still things you can do to save precious emails though. For example, you can forward the email to another client. This will work if you're trying to save emails before closing your Outlook account. Unfortunately, it will take some time because you'll have to send the emails one at a time. If you have one or two emails to save, consider taking screenshots. You can save the emails as images on your computer's hard drive.