Systems and methods for communicating using voice messages

A message authority, comprising:

• a first receiver configured to receive a data message from a client device, the client device being associated with a reply path;
• a transmitter or output port configured to transmit data messages to one or more mobile devices;
• a plurality of receivers or ports associated with a plurality of intermediate address associated with the message authority and configured to receive replies to data massages from the one or more mobile devices;
• and
• a processor configured to associate a reply path identifier associated with the reply path with an identifier associated with a mobile device and with one of the plurality of intermediate addresses, include or append the intermediate address to the data message, forward the data massage to the transmitter or output port, and, when a reply is received via one of the plurality of receivers or ports, determine a reply path identifier associated with a client device by reference to a combination of the mobile device identifier and the intermediate address.