On Ajthat the messages are sent using the principle of synkhronicity, which had turned out (once the rest of the universe managed to understand it... more or less) to be at the same time the cause and the result of the principle of causality, and the other way round (i.e. the question of what is consequence of what is discarded), and that the principle of synkhronicity, when applied to the above statement, has a consequence of (a parallel event of) it itself (i.e. the principle of synkhronicity) being at the same time (synkhronous) (with) the principle of causality.
It is clear that the number of people in the League who understand the substance of all this is insufficient to have any decent guesthouse agree to rent them the main meeting room for their annual gathering. They always meet in the smaller one, but at the same time in the big one their assistants amuse, or for a better word, confuse the reporters, and through them the various audiences League wide. Nobody understands anything, but it works ("it works even when you don't believe it").
How does it work, applied to sending a message? It works by message coming into existence at the same time at both ends, both the departure and the arrival point. Furthermore, sometimes it is a problem to find out which is which. In flat time space, this would mean the sender is the one who knew the message before the recipient. The time, however, is not flat. The curvature of time escapes measuring, and is taken for the usual factor of unreliability of transfer of messages or any other content. The author of the message doesn't really ever know whether it was him who initiated or was the subject of the event, which is quite nicely (at the same time) explained with both the principle of synkhronicity and the curved nature of time, which in turn gives a new aspect to the causality principle: the result really does come after the cause, it is the direction and the curvature of time between them which need to be established, to know which is which.
it is quite possible that it be established both places (sender
and recipient) that they were both first, or none were; that
means the time flows from one to the other, from other to one, and
the other way around. The time is not flat, nor is there any force
of gravity which would force it to flow always to the same side,
no matter how it may seem to us ("time is not subject to gravity
force, gravity force is not subject to time").