evidence: Bassas da India is an uninhabited atoll with no vegetation and the reef Banc du Geyser is more of a shipping hazard than anything else. But the islands of Juan de Nova, Tromelin, Europa and the Glorieuses all have airstrips and manned research and/or military bases. The islands are essentially guarded from unauthorized access and the waters around them are monitored for illegal activities. Each of the four islands has a designated postmaster, each with their own hand stamps. There are routine year-round flights to and from the islands, bringing in personnel and supplies, so getting mail there and back isn't a problem. Even the Marion Duffrense makes the occasional rotation through the islands.