I forgot the password to my old Outlook PST file, which contains some very important emails and contacts. Unfortunately, I have no backup of the password and can not remember it at all. I have tried opening the PST file in Outlook, but it keeps asking for the password, which I do not know anymore. Could anyone please guide me on how to unlock an Outlook PST file without knowing the password? Are there any free or reliable methods/tools to recover or remove the PST password safely?