Welcome back to our Community Forums! Thank you for your post, and I'm sorry to hear that your blueyonder email has not worked in so long!
Thank you for letting us know that you left our services at one point, and as @jpeg1 asked, can you please advise if you were in touch to have your older email re-assigned over to your current account?
Have you been able to check what listed emails you have listed on your online account? You can take a look here: virg.in/myVM
Please let us know how you get on and if you need any further assistance. We'll be happy to help.