You are just back to the same problem, you need to trust a server. The server is the valley between the generals, you can't be sure what happens there. Do they

You are just back to the same problem, you need to trust a server. The server is the valley between the generals, you can't be sure what happens there. Do they get the message, or do they het an altered message, both of which will send blue ticks to indicate it has been read.