The rise of the dark web has led to a huge increase in the amount of illegal drugs being sent from the Netherlands, one of the world’s largest drug producers, via letters and packages in the post.

The Dutch customs authority has warned that a sharp rise in successful seizures from the country’s postal service is indicative of a growing trend that it is struggling to crack.
https://www.theguardian.com/society/2019/apr/25/dark-web-blamed-for-rise-in-drugs-sent-by-post-from-netherlands