30. A computer-based system for transmitting an electronic document, comprising: an intermediate computer that is remote from a device sending a message, the intermediate computer including a memory storing instructions; and a processor configured to: execute the instructions to receive the message from the device, the message including a delivery address and a document, execute the instructions to determine that the document is to be cleansed of metadata according to a cleansing policy, execute the instructions to automatically create a cleansed version of the document by removing metadata from the document, execute the instructions to replace the document received with the message with the cleansed version of the document, and execute the instructions to send the message with the cleansed version of the document to the delivery address.
38. The system of claim 30 , wherein the processor is further configured to: execute the instructions to determine that the metadata includes a pre-specified type of metadata and responsive thereto, the processor does not execute the instructions to perform the creating, replacing, and sending operations.