I know that you are supposed to send thank you letters after an interview. But, I wanted to know if they had to be mailed. I know someone who works at the school where I interviewed. I wondered if it would be appropriate if they placed the thank you's into the school mailboxes. I wanted to try to get them delivered as quickly as possible. Another question I have is does each letter have to be different or can they be very similar. I have six to write and trying to write that many for one school has me worried.