Pst file is an account backup file of outlook. After setting up the corresponding e-mail account in outlook, you can view the backed-up e-mail by importing this file. The specific steps are as follows:

1. Start outlook (provided that the email account has been set, so I won't repeat it here);

2. Click the File tab, click Open, and then click Import.

3. Click Import from Other Programs or Files;

4. Click the outlook data file, and then click Next;

5. Click Browse, select the pst file to restore, and then click Next.

6. Click Finish.