I have a postfix server configured with imap. Only the recipient with the user account in the system is accepted. For example: rcpt to: test@localhost will yield the following error: 550 5.1.1 <test@localhost>: Recipient address rejected: User unknown in local recipient table What I want to achieve is setup virtual maps which accepts email to all the users (even if the user doesn't accept in the system) then forward all those emails to a specific user mailbox. Is something like this, possible?