I had a look at your server and it seems to be a normal CPanel email server. I’ve tried connecting to it but kept getting the same errors as you.
To test if it’s an issue with Linx, I’ve used a different CPanel domain that I’ve got and set up the email using the same configuration you are using. On my server it works perfectly, but on yours I get the socket error. The issue here seems to be on the routing / DNS settings of your domain. Can you confirm if your Outlook connects to your server on that same port number?
As a test, you can use my server and password above to see if you can connect to my server, but I’m going to disable this email address after today.