I wanted to give you an update on where we're at with BlueMail. We're currently working on a significant new build, and we wanted to get BlueMail solid for that release. However, while looking into this connection issue with BlueMail, the developers found some security concerns with the email client that are preventing them from testing things further. Unfortunately, BlueMail has not responded to our messages, and our progress with BlueMail will be halted until they do. We'll provide updates as they become available. 

Per Tim's response on the other thread https://portal.smartertools.com/community/a94938/bluemail-desktop-doesnt-work-with-smartermail-using-ews-protocol.aspx

Seems Blue Mail is meh, we moved our client from it to eM Client and they are happy.