Hi Nickywhu
Thanks for posting and welcome back to the community.
Sorry to hear of any email issue. To access, please ensure you've changed the My Virgin Media username to a non-Virgin Media email.
To do this if not, log in here - virg.in/myVM with the current username and password, then go to account settings, click email and then input a third party email address. Verify the change and that's sorted.
How you'd access the emails have changed. Via Webmail, you'd sign in via the third party username/password and then go to the bottom of the page and click emails. You'd then be directed to your mailbox.
For a third party client email, you'd firstly sign in - virg.in/myVM and then go to account settings. Click manage my Virgin Media email and then generate app password. On the third party client, you'd use the Virgin Media email and the generated app password to sign in.
If the mailbox is locked or Forbidden, simply log in online - virg.in/myVM and then go to account settings, manage my Virgin Media email and click generate app password. This unlocks the mailbox within 30 minutes.
Any issues, keep us posted 🙂