Wow! That's something new to learn. Thanks for help.
Right now the user has kept his website very simple as he does not want to spend much on it. For now there is no database that is storing user info, user info is just sent into the clients personal mailbox. Initially he just talked about auto-responding and not all 3 letters. So I told him YES Auto-Responding is possible through the mailbox but now this is getting complex. Now I am in dilemma!
Can you suggest some more options? Please..