I find myself really bothered by the fact that you would be reading all the messages. Granted I realize that in order to stuff the letters manually you would be

I find myself really bothered by the fact that you would be reading all the messages. Granted I realize that in order to stuff the letters manually you would be able to see them if you wanted to, but the fact that you have to search each message for the address and then remove the address from the message seems very human meaning you're at minimum skimming every message. I would much prefer some other method like a web form that included a separate box for address and the message itself. I too would be interested in an API for this in combination with some kind of developer pricing model.