In the final days of Fast Mail service, the RoadRailers bring up the rear as they travel north. Amtrak will stop shipping mail in October, 2004.
Louisville & Nashville #1100 Railway Post Office
These trains used to be used by the Postal Services. They don't use them anymore and now Railion uses them.
Celebrate the Century Postal Train on display in St. Louis.
an ex-railway post office/baggage heavyweight car in work service
Amtrak/US Postal Service "Celebrate the Century Express" special on display at Montgomery County Fairgrounds while CSX freight train passes.