Last few days I was working on first version of Managment interface for project of my friend "RunEasyMail". In short it is a collection of bash scripts which automates installation and configuration of email server.
My contribution for this is connected with managment part of users and for now is REST API which makes adding/removing users and domains very easy.
More information about project can be found at https://www.runeasymail.com/.
Any suggestions, requests and bug reports are wellcomed for API at https://github.com/runeasymail/ManagementAPI