This has been posted this in the forums, but we thought it was worth posting as an announcement too for those that don't frequent them.
http://steamcommunity.com/app/401680/discussions/0/352788552266155196/
As already confirmed, all the DLC from the original game (Special Delivery and Super POSTAL) will be coming to POSTAL Redux as a free update. We figured you guys would appreciate a preview of some of the upcoming maps, so here you are!
Tokyo
http://steamcommunity.com/sharedfiles/filedetails/?id=727484194
EZ Mart
http://steamcommunity.com/sharedfiles/filedetails/?id=727483117
Earthquake
http://steamcommunity.com/sharedfiles/filedetails/?id=727482542
La Palamino Resort
http://steamcommunity.com/sharedfiles/filedetails/?id=727483696
The missing to maps are still in the oven but will be included in the update.