55. The storage medium of claim 51 , wherein the instructions cause the processor to further perform the operation of generating an alert that the message was not sent if the metadata includes a pre-specified type of metadata.
51. A non-transitory computer-readable storage medium storing instructions for transmitting an electronic document, the instructions causing one or more computer processors at an intermediate computer that is remote from an electronic device sending a message to perform operations comprising: receiving the message from the device, the message including a delivery address and a document; determining that the document is to be cleansed of metadata according to a cleansing policy; automatically creating a cleansed version of the document by removing metadata from the document; replacing the document received with the message with the cleansed version of the document; and sending the message with the cleansed version of the document to the delivery address.