PST is an Outlook database that stores all the offline copies of your email messages, contacts, appointments, tasks, journal entries, notes, RSS feeds, settings, E-mail accounts, message rules, junk e-mail lists and signatures. When the items are recorded in the database there is an index that points to each item. When you delete an email or any other item in the outlook, it doesn’t actually delete the items; it just deletes the items listings from the index. The email is still in the PST file but not accessible because Outlook has no idea where it is without the pointer in the index.
When you delete an email in Outlook it really isn’t deleted; it’s only marked for deletion. It’s only until you compact your PST file that your email is permanently erased, and the empty space is reclaimed. Once the PST has 20% empty space, Outlook begins compacting the PST automatically. If the Deleted Items folder contains lot of messages, Outlook may begin compacting the PST immediately and the items will be deleted forever within a few minutes.
PST files are stored on your hard drive because your hard drive is constantly overwriting files to make space for new information you put into it. If your hard drive is full and there is not much space or memory available it is highly probable that the email has already been overwritten and deleted permanently. Thus it is very important to act instantly to recover those accidentally deleted emails. To recover deleted emails from outlook PST the sooner you will act the better will be the results.
To recover deleted emails you need a specific email recovery program that will scan your system for deleted emails and recover them all. The best bit of using email recovery software is you can preview the deleted files and emails before recovering them. With email recovery software you can get your deleted emails back. REMO Recover Outlook (pst) mail recovery locates the database file (PST) that controls all of these functions, restores it to original condition and quickly puts your lost/deleted messages back.