請問這封信在說什麼，是詐騙嗎?

請問這封信在說什麼，是詐騙嗎
Dear Winner,
We are pleased to inform you that your emails/company address has been selected for a cash prize offer as registered member of Internet E-mail user. You have subsequently won the sum of Seven Hundred and Twenty Thousand United State Dollars Only [US$720,000.00] from the Sweepstakes National Lottery international emails award promotion drawn on the March 1, 2018.
 
All participants were selected from worldwide websites through our Microsoft computer ballot system drawn from 21,000 names, 3,000 names from each continent (Canada, Asia, Australia, United state, Europe, Middle East, Africa and Oceania, as part of international "e-mails" award promotions program, which is conducted annually for prominent ms -word users all over the world, and to encourage the user of internet and alleviate poverty worldwide