I am having similar problems. Maxbulk was working just fine while my Department had its own mail system. But we had to move to the central one for the whole University, which is based on Office 365. The problem now is this: If I deactivate SSL, the server complains that I didn't authentically myself. If I use SSL V2 or SSL V2/3 or SSL V3 or TLS V1.2, it hangs in connecting mode. If I use TLS V1.2 Exp, I get the attached message which effectively says the software should support TLS 1.2. I use version 8.7.5 in paid mode but the demo mode of the latest version also has the same problem.