Hi there @Enduser
Welcome back to our Community and thanks so much for your post. As our VIP @HowardML has advised we are aware some customers are having issues and this us under investigation. However, in order to add you to our list and see if you are impacted with the same issue, we just need some additional information if possible
We'd like you to run a "curl" prompt if possible - @HowardML advised about this on the thread he has linked above.
Open a command prompt (not a powershell) in windows 10 and run this command:
curl -v imaps://imap.virginmedia.com/ -u username:password
Please use your real username (full email address) and your password. It makes a brief connection to the server to test it. Post the output here and we'll take a further look. Remember to obscure your personal details - passwords, email addresses.
Keep us posted 🙂