San Juan - Post Report Question and Answers
How do you send and receive your letters and package mail? Are local postal facilities adequate?
Regular U.S. mail. It is nice because you can order many things from the U.S. but there are times where some items won't be shipped to the island (some appliances or miscellaneous goods). It seems random which items can or can't be shipped so you just have to try. - Jan 2014
Good old regular US Mail. Some stores will not ship here (Target, for example). - Jun 2013