PST files are the main storage database for MS Outlook which contains all the items of the user mailbox. These files contains all the emails, email attachments, contacts address books, journals, notes, tasks, appointments, schedules, etc. PST files or the Personal Folder File can be located through the path C:\Documents and Settings\User_id\Local Settings\Data Files\Microsoft\Outlook\Outlook.PST. These files have predefined size limits depending on the MS Outlook version. Whenever PST files gets overloaded with emails and other mailbox items, the size limit exceeds and this leads to PST corruption. Any type of damage to PST files result in loss of emails along with other user mailbox items. There are other reasons that could result in PST corruption apart from the size limit problem. Factors such as PST header corruption, media corruption, software and hardware failure, power outages and virus attacks are also responsible for PST file damage. Outlook mail recovery software programs are then used to repair the damaged PST files and recover the constituent emails. Software like kernel for Outlook PST repair are built on advanced technology to make the process of mail recovery swift and accurate. Outlook mail recovery software is equipped with powerful scanning algorithm to search for all the deleted, lost or inaccessible items in the damaged PST files. The two powerful scanning modes, viz., Quick Scan Mode and Advanced Scan Mode are used to retrieve the mailbox items within seconds. Outlook mail recovery tools allow users to recover emails with their data structure, properties and metadata intact. From a list of all the recovered emails, users can select the ones they wish to save in some other location of the hard drive. In addition to the emails, drafts, notes, tasks, journals, calendars, address book and other items of the mailbox can also be recovered using the Outlook email recovery software.