MS Outlook offers a very effective and secure application, which is well known as Inbox Repair Tool or Scanpst.exe. This application can easily solve minor level of PST corruption issues within seconds. To repair highly damaged PST files, there is a need of third party Outlook PST repair software. The software allows you to fix any kinds of PST errors and recover lost or inaccessible data from corrupted PST files. To know more about the tool, visit: http://www.instructables.com/id/How-to-Solve-MS-Outlook-Not-Responding-Error-or-Ou/step2/To-reduce-the-size-of-the-mailbox-use-the-followin/