I am glad to add a new country to the list: Mozambique. But there is a trick, in fact! I received these two postcards written and stamped (both with the stamp you can see below this lines)... not by snail mail, but in hand.
A friend of mine travelled to Mozambique and South-Africa, bought the postcards for me, wrote them, bought the stamp (in South-Africa; she had no time in Mozambique)... and then she realised she had forgotten my address!
Anyway, I like them and I am very grateful for having thought of me!