PST files are the primary file system used in Microsoft Outlook. When messages are sent using outlook those messages are PST files. When the messages are stored they are stored as PST files. And when messages are compressed they are compressed as PST files. But PST files are apt to become damaged if file size limits are exceeded. They can also be corrupted when being scanned for viruses during download. It is a tough situation as one needs to check incoming mail for viruses but the tool to check the mail often destroys the letter. A solution to this problem is the Outlook Mail Recovery program from REMO. This user friendly program enables anyone with any level of computer expertise to initiate fast simple PST repair.