Mail without TLS

Tim

I have been wondering the same thing but none of the answers here make sense to me. 

In our case, and it looks like yours as well, the connector exists to allow printers, scanners, software, and other devices to send email using an unauthenticated smtp connection to Office 365. What appears to me to be happening is that some of those devices are sending email without using TLS 1.2. I assume that is either because the devices are unable to (Too old or need updates) or they are able too but TLS 1.2 is not enabled on those devices. 

I thought that the solution was to find those devices and update them and enable TLS 1.2 if possible. However, I haven't been able to find a way to identify where the emails are coming from. In your case if you could drill down on the 104 NO TLS messages to see where they come from you could quickly determine whether they could be updated to send TLS 1.2 and get rid of the warnings. If someone knows how to do that please tell. 

Or maybe I have completely misunderstood what is going on ...