It Is Impossible to Get Mail from Guatemala

Girl form Tecpàn

Claire went to Guatemala and bought these colourful postcards. She wrote them, went to the post office... just to be told that there was no mail service in the Guatemala. (But they keep selling postcards -?!)

She sent me the postcards after her trip, from the United States, along with an article which explained (sort of) that the mail service was suspended in 2016 and

[...] it’s still non-existent, making Guatemala the only country in Central or South American without a postal service, and one of the only countries in the world to be without (although some countries have suspended international deliveries and others are massively inefficient).

Antigua

Now I wonder which other countries in the world (if any) have no mail service... Have you any information about?

[I have seen Postcrossing postcards sent from Guatemala last month, like this one. How...?!?]