Hi, tnahx for the reply. Sorry I checked it so late. Well, I've read this stuff you paste, but it does not satysfe me. I want to make custom error templates, like no such user message or greylisting in action.. I want also customize the messages about quota exceeding. Is it possible via bounce.cf, because I can't find and information in this case. Few years ago, when I compiled postfix from source it could be done in the configuration before compiling the package. Can you tell me how to make it possible now?