I tunes is asking me to verify my account. What does this mean?

I have been using this a count for a few year, iTunes sends an e mail and asked me to click on the e mail link, only problem is that I stopped using this e mail about 5 years ago and cannot access it.

How do I get iTunes to send the verification e mail to my new e mail

PLEASE HELP as I have quite a lot of money in my iTunes account.

Thanks