MDR no im not sure what it means exactly.. I clicked on this because it reminded me of a camp i went to with Friends and when we were siting around the feu the older guys were giving people weird nicknames and they gave my friend Daniel the name "gaggles" MDR :P
Yes. It is a school based e-mail that most schools have for students to use. It is very sûr, sans danger adn most schools like it because the teachers can read every e-mail that a student sends ou recieves. Also, it's easy to attach documents, which my school uses quite often. It's also a lot easier for teachers to e-mail students liens for assignments ou help websites.