Abstract: An interactive information management system is provided to interact with e-mail systems by which information sent or received as attachment can be managed and shared dynamically among e-mail users. E-mail users can indicate rules on attachment and share information management with e-mail receivers in such a way that ensures data integrity and efficiency. The information management system uses Concurrent Version Control to manage the integrity of the content and may use a different connection channel other than the e-mail itself to transfer attachments. And the system provides both web-based information management interface and e-mail client plug-in interface for real-time attachment and related information management. The user of the system may use any e-mail clients and systems to interact with the information management system.