Recovering Outlook OST mails becomes necessary when the file gets corrupted, becomes inaccessible, or Outlook stops recognizing it. A straightforward way to restore the data is by using a recovery utility that can scan and rebuild the file. For example, the SysInfo OST Recovery Tool helps by scanning the damaged OST file through its Standard, Advanced, or Deep recovery modes, depending on the level of corruption. After scanning, it lets you preview the recovered emails, contacts, calendars, and other items before saving them in formats like PST, EML, MSG, MBOX, or DBX. This allows you to reopen your mail data in Outlook or other email clients even if the original OST cannot be fixed.
Read more: https://www.sysinfotools.com/recovery/ost-file-recovery.php