To restrict a user to send mails only to 3 e-mails IDs using postfix mail server
I am implementing postfix mail server.My requirement is below.
I want to restrict users to send mail only to predefined mails IDs.
User mail ID:email@example.com
mail IDs : firstname.lastname@example.org,email@example.com...estexample.com
User sharath has privelige to send mails to the above mails IDs only.
How can i achieve this in postfix?.Please help me.