A method and system are provided for processing a message, which is being delivered from one mobile network to another. A request to send routing instructions of the message to a store-and-forward center of a transmitting mobile network is received at a moderator server of a receiving mobile network. The routing instructions are generated in the moderator server, so that the routing instructions instruct the store-and-forward center to route the message to a gateway server of the receiving mobile network. The routing instructions are transmitted from the moderator server to the store-and-forward center. Then the message, which has been sent according to the routing instructions from the store-and-forward center of the transmitting mobile network, is received at the gateway server. From the gateway server the message is forwarded for modifying and archiving purposes of the message.