Thanks for coming back to us. Unfortunately, we'd have to speak to the account holder to see what can be done in regards to recovering an email.
The email would have been attached to an account when it was created, however, if the mailbox is attached to a closed Virgin Media account, this can mean that the mailbox has been deleted, as if an email is not attached to an active broadband account, we have the right to close the mailbox down within 90 days of account closure. Apologies for any inconvenience this may have caused.
If possible, the former account holder can create a Profile on the Forums and create a post about this issue so that we can assist further and investigate this as much as we can.