Hello, all... I was wondering if there is a way to tell postfix, that if an email comes in for a user that does not exist, do not send back to the sender an email stating this? My problem is that we get mail bombed, emails come in, postfix checks the recipient, it does not exist, so it tries to send back and email telling the sender that email does not exist. so emails pile up in the queue, because the senders email does not exist... I want to stop this. How would I do this? I thought it would be a simple rule to add to postfix main.cfr? Thanks..