Ask HN: No STARTTLS on live.com email?

I used checktls.com to test whether on my own mailserver encryption was working as set up (STARTTLS on port 25). It is. It also seems to be available for my Gmail address but my live.com (Microsoft) address does not have this option. What does this mean? Is email still sent around unencrypted between mail servers, is this what is acceptable? I know there is GPG to solve this but still STARTTLS would prevent a lot of snooping options.