Thanks all. I now understand. ... >> My postfix sends a message back to the sender that it was to a >> non-existent address. I was thinking about not sending them anything >> back. No need to tell them they guessed wrong. >> > > in a good confifguration postfix doesn't _send_. it _rejects_ the > transaction. this is like a 404 in http. the bounce is created by the > client MTA, not by your postfix.
An example where my server rejected a bad address: "The error that the other server returned was: 550 550 5.1.1 <a...@dev.jsoft.com>: Recipient address rejected: User unknown in virtual alias table (state 14)." I do not send bounces. I reject them like the above. sooo It's a bad idea to mess with the rejection message. Thanks again. Gary
