The moment you do backup mail from Outlook, such mails are stored as PST files. This is how, later, such backed up mail can be retrieved. But the way those files are saved and retrieved depend a lot on the version of Outlook you are using. You have to know the previous the moment you do make back-ups. On this page Recover Damaged PST File you will understand how to recover damaged PST file.
But, once in a while, those PST files can get damaged by some spyware or other Internet virus. You will not be able to retrieve your stored emails given the corruption that will affect them. You will notice a file is damaged the moment you do try to load it into Outlook. Either the PST file will hang for a while or you will get a warning from Outlook saying it (the PST file) is infected by a spyware. When such thing will happen, you have to look for a solution to fix the spyware PST corruption. A pst file corrupted by a spyware can be repaired in many ways. Look here Repair PST file Outlook 2007 to repair PST files for Outlook 2007, and here PST Repair Software for a PST repair software.
The easiest way to restore PST files damaged by Malware is to use Inbox repair tools. Windows 2000, and above versions, will have such tools available. They can be able to restore some cases of damage by Malware and other virus attacks on the PST files. It is also possible to use your antivirus and antimalware application to try to stop the problem and to restore any PST files damaged by such spyware.
Sometimes, such basic diagnosis and solution will work 100% to restore any corrupted PST file. You will then be able to retrieve your emails again. However, in some cases, this does not happen and you still cannot restore PST files damaged by Malware. In such cases, you have to use some third party PST repair application. Such third party PST repair program will stop any virus (or malware) while keeping your emails fully safe for later use. This is a very easy plug and play program. Your email problem will be repaired in a few minutes. Third party PST repair software are cheap and easy to find on the Internet. However, you will need to be careful and do your due diligence so as not to get scammed.
