postfix setup

we are using postfix mailserver and running mailscanner on it. currently we cannot manage bounce emails per user account. cause we couldn't set multi return-path. here is the scenario: we have a lot of account which they can send email. we want manage bounced emails for each accounts. for example : send account = return path = these settings should be set for each accounts. Note: currently we setted in postfix configuration: notify_classes = bounce bounce_notice_recipient = then all bounced emails send above address for all accounts. we want to deliver all bounced emails to sending accounts return path. This meant we need to set that return-path (for bounced emails) for each account. Then we able to manage bounced emails for each account. Note: after some search we found a solution for that I think. there is a mechanism called VERP and you can see for details at [login to view URL]