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While the operation of MRX is very simple and obvious to the user, this is achieved by some extremely sophisticated software. MRX has been designed to operate in a distributed environment, where there may be many mail clients and many mail servers, and these can be located on geographically different sites. Indeed, it is often desirable that the mail archive is located at a site remote from the mail servers so that in the event of a catastrophic loss of servers, mail can be accessed and recovered immediately.

The technical implications of distributed mail management are wide ranging. Latency on connections can cause mail management systems designed for single site operation to fail.

The complexity of company's mail topology is totally hidden from the user by an extremely fast and intuitive web front end. Mail is never intercepted, always duplicated, so failure by any MRX hardware component will never result in the loss of mail.

The following section on data flow shows the operation of MRX in a simple schematic. However, in practice there may be several mail servers and each component may be located at different sites.