Many European post services halt posting services to USA citing that airlines don't want to carry mail to the USA thanks to being unable to process the duties to USA goverment. These national carries include Finland, Sweden, Norway and Estonia, to name a few. USA joins a list of countries in which Finnish Posti won't send any mail or packages. These countries are: Afghanistan, Bahamas, Belarus, Bhutan, Brunei, East Timor, El Salvador, Iran, Laos, Libya, Nicaragua, North Korea, Russia, Solomon Islands, Syria, Trinidad and Tobago, and Yemen. https://www.posti.fi/en/latest-news-at-posti/%20/news/trump-administration-decision