I sent the thank you letter to them .. I think it is a good idea .. at least they will open my email and see my name . who knows .. they will call me " .. ' Ok Aalu .... you are selected " wow ...  ..day dreaming

Interestingly, the company where I am currently working at .. when they took the interview ..  fck me ... I did not write a single " thank you" to them .. Ulto .. I bargained about the salary .. fck .. that's why they did not increase the salary ...