EMS International Postal Service Express Mail Service offered by postal Caribbean Universal Postal Union of Universal Postal Union (UPU). Universal Postal Union (UPU), Universal Postal Union is a professional organization of Nations which comprises of postal services worldwide. EMS Today, the Ministry has taken seriously Service for Express Mail Service (EMS). EMS is a leading service currently covers Covering the entire territory, and parts of the world. Biggest advantage of Cause global structure allows clients to send mails to almost everywhere Worldwide. Equipped with modern technology and equipment, such as International Postal System (IPS) and the latest scanning Customers become more confident.