Storage model for maintaining structured document fidelity

Architecture that introduces storage of an extra (skeleton) property of a document as well as default document properties on a server. In a specific messaging implementation, a MIME skeleton property is stamped on an arriving MIME messages. An incoming MIME message is shredded and all content that is currently saved to MAPI properties continues to be saved. The remaining message content that is not saved to the MAPI properties is stored in the skeleton property. The skeleton property includes all body part headers and any body part content that was not saved as a property on the item by the server. On retrieval of this message by a MIME client, the MIME message is regenerated in full fidelity by using the default set of properties in combination with the skeleton (or extra) property and the stored body content.