By the way, for those who are wondering about the ways of communication from the embassy, there are no rules, my wife when we applied received a letter by MAIL (pOST oFFICE ) to her house and also an e-mail, but after that all communications were done by e-mail (internet), only the first letter with the B-number was by post.
just to share,
I really wish that all who are waiting to have PPR very soon inshala, i know how it feels since i waited 9 month to have it and thank god it did not take longer,
Good luck to all.