You're right, deleting junk emails can significantly reduce the size of a PST file. I recently used the DataVare Outlook PST Compact Expert Tool, and it proved to be very useful. Using this tool, I easily compressed my large PST files without any data loss. The best part is that it reduces the file size without affecting the quality of emails, attachments, & other Outlook items. The interface is also very simple, making it easy for even a non-technical user to use. If your PST file has become very large & Outlook is running slowly, I definitely recommend trying the Outlook PST Compress Tool.

Blog:- https://www.datavare.com/how/reduce-outlook-pst-files/