These are 3 very simple web forms to help administration of Postfix:
(1) domain management - adding / deleting domains, adding / deleting supervisors, assigning supervisor for domains
(2) account management - adding / changing / deleting / deactivating / reactivating mail accounts for a given domain; specifying recipients for BCC copies of all incoming and outgoing messages of a given mail account
(3) alias management - adding / changing / deleting aliases and their destination(s)