If you have a PST file from a previous computer or job and want to check what's inside, this guide makes things easy. It shows how to open PST file without Outlook using a viewer that doesn't require the Outlook program itself. The MSOutlookHelp PST Viewer displays full email content including sender, date, subject and attachments. You can also open more than one PST file in the same session, which helps when dealing with multiple archives. The viewer keeps everything organised in a familiar folder layout, making it easy to find what you need.