>>Oh, I see. I have "always" had my own exchange server, so it didn't cross my mind that you might have another setup. Unless you have a backup, or the email is
>in the Delete Items folder, I guess you will have to contact whoever runs your email server.
>
>I am the one who runs the mail server. But, at first, I am trying to recover the email as is. I have found a way to go in the hex file, remove a specific number of characters from 7 to 13, save that as a temporary file, use that file temporary (the .pst file). That works. However, that approach recovered starting at August 28 and is missing from that date until September 20. I am trying now with a more robust software.

Good luck, I know the job can be a PITA. I used to have a Unix email server, but for the last approximately ten years I have used Exchange without any problems.