The application features advanced built-in search, which really comes in handy when dealing with a large mailbox. This means that you are not allowed to make any changes to the mailbox content, therefore you cannot delete mails or move content around.Īside from emails, OST PST Viewer also extracts calendar entries from the input files, as well as the list of contacts, tasks, notes, and the list of folders. In other words, you can use OST PST Viewer to open and view the content of your PST or OST mailbox in read-only mode. However, if the mailbox has additional folders, all of them are revealed.Īs its name clearly suggests, the application is a viewer and nothing more. By default, these include inbox items, sent messages, deleted mailbox entries, and the outbox content. It enables you to load one or more files, carefully placing each one in the left-side panel, with all its components. This particular application manages to open PST and OST files, enabling you to preview the data they store. One of them is simply named OST PST Viewer. Opening orphaned PST and OST files is not possible without Outlook, unless you have a dedicated application and there are a few viewers to choose from. Microsoft Outlook and Exchange save all their data, including email messages or calendar entries to proprietary file formats, namely PST and OST.

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