Standard recovery options become unavailable when trying to recover permanently deleted emails from OST file after Shift+Delete, since this key combination bypasses the Deleted Items folder entirely and removes messages without the usual 30-day retention window most users rely on. Checking the Recoverable Items folder through Outlook’s Recover Deleted Items feature works only when server-side retention policies are still active, leaving no path forward once that secondary retention period also expires. Restoring from a previous OST snapshot is another option, but it requires a backup to have existed before the deletion occurred, which is rarely the case for unplanned Shift+Delete actions. The SysInfo OST Recovery Tool scans the OST file directly at the file level rather than relying on Outlook’s retention mechanisms, recovering permanently deleted emails along with their original attachments through its Advanced or Deep recovery modes. The Search feature helps locate specific deleted messages within the recovered tree structure when manual browsing through large mailboxes becomes impractical. Recovered emails are saved in PST, EML, MSG, or MBOX formats while preserving original metadata. Compatible with all Outlook versions up to 2021 and all Windows versions including Windows 11.