VBox.Adm!

Modoboa is a mail hosting and management platform including a modern and simplified Web User Interface . It provides useful components such as an administration panel or a webmail.

Postfix Admin is a web based interface used to manage mailboxes, virtual domains and aliases. It also features support for vacation/out-of-the-office messages.

ViMbAdmin (pronounced vim-be-admin and meaning Virtual Mailbox Administration) is intended as an alternative to (and a near slot in replacement) for the popular but dated Postfix Admin application.

Møil is an open source administration user interface for database backed mail servers (postfix/dovecot). It brings the handy possibility of managing the database with migrations and a lot of beautiful CRUD.