I have an old Outlook PST file that I need to inspect, but Outlook isn't installed on my current system. I mainly want to preview emails, attachments, contacts, calendars, and the folder structure without modifying the original PST file.

Is there a reliable PST Viewer that can open and preview PST files directly? It would be helpful if the tool supports both ANSI and Unicode PST files and can handle older Outlook archives.

I came across SysInfo PST Viewer,  which is designed for viewing PST files without requiring Outlook. It allows users to browse mailbox folders and preview emails, attachments, contacts, calendars, tasks, and other PST data.