Recently, I opened an old Outlook PST file, but couldn't remember the password. I tried a lot, but nothing worked. Then I came to know about GainTools PST Password Recovery Tool. To tell you the truth, this tool is very easy and fast. Just select the PST file, and it shows the password in a few seconds. No data loss, no file corruption. If you have also forgotten the password or the old file is not opening, then definitely try this tool once.