Abstract: A telecommunication system comprises: a computer system; transmitter/receiver units; and wireless telephones which are used by users, and comprise means for sending and receiving SMS and/or MMS messages to and from a selected user via the computer system. The computer system comprises: a memory for messages; access means with which a user gains access to the memory; and identification means which assign a code and send this code to the relevant telephone, wherein the access means are released by the user sending this code to an allocated phone number, wherein: after sending the code for the first time, messages addressed to the user are stored in the memory and blocked from transmission; and by sending the code for the second and subsequent times, all messages stored in the memory are sent to the user.