Due to Microsoft making it inconvenient to use Outlook with any other mailserver than MS Exchange, and Mozilla ignoring my requests to further develop Thunderbird. I have decided to develop my own. RCC will be highly compatible and will work with any server, including MS Exchange but importantly it will not be restricted if your mail server happens to be an IMAP or POP3 server made by anyone else. It will include CalDAV and CardDAV for access to server side calendar and contacts and it will also be Open LDAP compatible. I will of course include support for the Microsoft modified Open LDAP (Active Directory.)
It will have new features not seen before in an email client that will increase the flow of knowledge to both staff and customers of any enterprise. Collaboration is critical to our survival. I am disappointed Mozilla think the shop window (browser) is what matters. They are chasing money with their malware susceptible design, idiots.
It is currently a work in progress and my work is currently disrupted due to my coping mechanisms being taken away from me! When it is fundamentally functional I will be distributing it here. If anyone would like to be involved in the development please email me.
Update 31/07/2016: I have a kitchen and as a result my coping mechanisms are mostly rebuilt so work is nearly possible. I have howerver decided to utilise the summer weather. This is an important part of recovering from MS. I will pick up development again when the weather traps me indoors.