A solid-state light source that is compatible with the existing sockets normally reserved for filamented lamps. The method includes receiving in the control system a format-selection parameter relating to a format-specific code portion selected from a plurality of format-specific sub-portions wherein each sub-portion corresponds to a specific storage format. The method may also include comparing the at least one new sequence number to an anti-replay window configured to prevent packet replay, the anti-replay window having at least one existing sequence number. The clients include storage for holding the digital contents therein by use of the packets of the minimum unit received from the server and packets received from other clients constructing the second network. The method may also include identifying one or more emails sent from the email sender address to one or more local recipients.