Split Outlook Mailbox Folders - Version 2.2 Some time your PC runs slower due to increased the Outlook mailbox file. To boost up the performance of your PC it is require to spilt outlook mailbox Folders into some smaller parts. Split Magic provides you to optimize your work. You can split your outlook mailbox into three categories:Split by size: Split by size allows you to split according to the size of mailbox. You can split Outlook mailbox Folders by size 256MB, 512MB, 1GB, 2GB, 3GB & 4GB parts.Split by date: This option allows you to split Outlook mailbox folder by a selected date. If you choose a date, this will split selected file into two parts, one for before the chosen date & second for after it.Split by year: This will allow you to split the Outlook mailbox folder by year wise. If you select the year range from 1997 to 2005 then you will get 9 files for every year separately.