New Industry Mail Expansion
Extends many wagons, trucks, and ships – vanilla and mods – to support mail delivery.
(Requires New Industry 2.54)
https://steamcommunity.com/workshop/filedetails/?id=1165791968
This is a small modification which adds Mail to the cargo list for Boxcars, Box Trucks, and Ships, so mail is NOT loaded into a tankcar or a gondola!
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