Hi: sorry for stupid me. I have read the document http://postfix.cs.utah.edu/RESTRICTION_CLASS_README.html
and I understand " you can't specify a lookup table on the right-hand side of a Postfix access table. This is because Postfix needs to open lookup tables ahead of time" now I want to restrict users who can send to "a...@example.com" belongs to: 1. 127.0.0.1 2. 192.168.1.0/24 3. smtp-auth users how can I config it? I lost in configuration parameters. thanks a lot for hint!!