only one of us uses email client

This is one of the best manual method for Outlook

• 1. Quit the application
• 2. Scanpst.exe is a hidden file so make sure that the 'Show hidden files and folders' setting is enabled in the folder options
• 3. Click Start | Search, or Find and type 'Scanpst.exe' in the Search box
• 4. Double-click to open the file and browse to the location of your damaged archive.pst
• 5. Click 'Start' to start the recovery process
• 6. Try to open the file in question again. The corruption problem should not exist.

Usually if such methods cannot help, you may use Google and to find something like outlook.pst repair tool