It’s buried in the Terminal Services page – but it states there is a drop box, “Located in the main floor lobby across from the passenger security screening area.”
Someone sent in a postcard first notifying me that there is a mailbox across from the Delta ticket counter.
Looking at the terminal map – and it’s not the best I’ve seen – this can’t be too much of a hassle to locate. It’s not that big of an airport. (But there is a page if you need help navigating their roundabout in front of the airport.)
Last Updated 2 November 2017