When you recieve a message via someone else on another server, a PM bubble appears (well, if the server accepts bubbles anyways), and then when you open your playerlist, you will see a pm bubble next to: Account name (on servername) and then you double click to open the message and viola.
So there's something built into the earlier versions to allow them to receive PMs from other servers?
So there's something built into the earlier versions to allow them to receive PMs from other servers?
Not exactly; I think it is something built into the GServer. When someone sends a PM from another server, a fake client logs on to the receiving server with player ID 16000+ and sends the message.