Sparrow email client is the email platform designed for Windows and Mac systems. The platform does not include any fancy interface that may lure to use it. A user can go through the threads of communication without facing any technical issue. To view the concerned email, just select it and have a preview in a new window pane. On the other hand, if user has multiple email accounts, then they can be accessed through multiple account switching feature. However, in recent times with more use of MS Outlook platform, the Sparrow users are also migrating to Outlook in a good pace. With Outlook the multiple issues get clear in a very quick time. To migrate the files from Sparrow mailbox a user has to take assistance from an external utility such as Kernel for MBOX to PST. To initiate the migration from Sparrow to PST (Outlook), a user has to follow these steps: