The airport’s Web site lists a postal services page that mentions two post offices: one in Terminal 1 and one in Terminal 2A. However, it looks like Terminal 1 is no longer there.
The airport map states the post office is on the mezzanine level (top?) post-security. The FAQ confirms this:
a post office is available in the departure hall of Terminal 2A, on the mezzanine level.
There may be drop boxes around the terminal. If they are, they will be red.
Last updated 24 December 2018