Web-based email services such as Yahoo! and Gmail have become more and more advanced to the point that they are almost indistinguishable from dedicated desktop email clients in terms of features.
But there is still a huge market for clients such as Outlook and, unlike online email services, you are placed firmly in charge of your data and bear responsibility for making sure that it remain safe and accessible. The problem with Outlook is that all of you emails and other data are stored in one, potentially gigantic, PST file. Should this become corrupt, you run the risk of losing everything, but Stellar Phoenix Outlook PST Repair is, as the name suggests, a tool designed to help you out should the worst happen.