You can mail your postcards from the airport purchased from the French Quarter, or those from Mardi Gras.
Nothing reported anywhere on their updated Web site.
Robert wrote in that with the new terminal, things have changed: it’s a slot in the wall on the first floor by customs.
Based on their new map application, it’s likely to be on the ground floor (arrivals) next to the Global Entry Enrollment Office is and where the Southwest Baggage Service desks are.
Last updated 22 November 2021