SMTP SSL Error

Hey guys, just installed n8n using docker and tried to setup smtp node. Using smtp.office365.com I run into the very same err.
I startet off with the default docker image and also tried latest-debian (since my docker-host is running debian 10.12) … but no dice either way.
The topics here and in the linked thread on github are not that new really, so I wonder if I am actually running across the same issue or whether its just similar that fails on same code-location?