Hello, Hibero
I will send you a test message shortly. My experience is that when I send a message it says it is: (a) waiting for encryption; (b) message sent, waiting for acknowledgement; © acknowledgement received.
It takes a day or two between each stage. The trick, I find, is to leave your computer on overnight, with Bitmessage running.
So far, I have not received a reply back from anyone I have sent a test message to - I guess they are going through the same process, in reverse.