I had my first real interview for a job (internship) exactly 3 weeks ago. I recieved a letter yesterday saying that I didn't get the internship, but I am really curious why I didn't get it. It seemed like I had all the qualifications they were looking for and a bit more. Is there any problem with sending an email to the interviewer (same person who signed the letter) to ask him why I didn't get it? What should I ask him in the email?