Users affected by the loss of historical emails should have received an email from VM along the lines of:
Virgin Media’s Message
What has happened?
Due to a technical issue, Virgin Media email services were disrupted for most of the day on 19 June. We want to sincerely apologise for the frustration and inconvenience this may have caused you.
While our teams have been able to fully restore most email services, work is still underway to completely resolve the issue for some accounts which includes yours.
What does this mean for me?
You are now able to send and receive emails as you normally would. However, you will have noticed that any emails received on or before 19 June will not be appearing in your inbox, sent items or any other folders.
We want to reassure you that your emails and data are safe and secure; there is currently nothing to suggest your account has been compromised; and that all emails will be fully restored once the relevant system repair has been completed. Any emails sent to you on 19 June when this problem occurred, but not received, will also be delivered to your inbox once this issue has been fully fixed.
For any urgent emails you are waiting to receive, we suggest that you contact the original senders while we move all your backed up data to your mailbox.
What are you doing to fix this?
Our focus now is on working around the clock to ensure your emails are restored as quickly as possible. You do not need to take any further action and we will provide further updates as soon as we can. If you do need further assistance then our customer service teams are on hand to help wherever they can.
We appreciate your patience and understanding.