Denmark's state-run postal service, PostNord, is to end all letter deliveries at the end of 2025, citing a 90% decline in letter volumes since the start of the century.

The decision brings to an end 400 years of the company's letter service. Denmark's 1,500 post boxes will start to disappear from the start of June.

Transport Minister Thomas Danielsen sought to reassure Danes, saying letters would still be sent and received as "there is a free market for both letters and parcels".

Denmark ranks as one of the world's most digitalised countries.

There's an app for almost everything: few people use cash, and Danes even carry drivers' licences and health cards on their smartphones.

Bank statements, bills, and correspondence from local authorities are all sent electronically.

Public services send communications via a Digital Post app or other platforms and PostNord Denmark says the letter market is no longer profitable.

Letter numbers have fallen since the start of the century from 1.4 billion to 110 million last year.