PSTCompactor Professional - Reclaim wasted space from Microsoft Outlook PST files at home or across the Enterprise, speeding up Outlook and increasing reliabilty. Reduce mailboxes by up to 38% by compressing attachments (zip), automating compaction and more. Its powerful rules-based engine enables selective message processing, simplifying management and implementation of Enterprise E-mail Policies. PSTCompactor locates mailboxes across the network and does not require changes to your Exchange server or client PCs.