Mail train

Many countries have had dedicated railway services for the delivery of postal mail.
Examples include:

In Australia, the Travelling post office, Queensland
In Austria, the
In France, the SNCF TGV La Poste were rail cars built specifically for La Poste, which had run rail services since 1846
In Germany, as well as the , several cities have their own mail trains, including:
* in Berlin
* in Munich
In Switzerland, the has run since 1847
In the United Kingdom, the Travelling Post Office was a service where post was sorted en route
* The London Post Office Railway operated in dedicated tunnels under London
In the United States, the Railway Mail Service of the United States Postal Service carried the vast majority of mail from the 1890s until the 1960s
* The Railway Mail Service used railway post offices within passenger services to sort post en route
* The use of the Chicago Tunnel Company for mail freight inspired the London Post Office Railway