I keep getting notifications about my Freenet account? Is that legal?

I don't know what this is about: I get this message a lot. What can I do, or what do I have to do? Can anyone explain this to me? I don't dare click on the link; who knows what might happen? 😉

Dear member,

You will lose access to your current account software within 3 days if you do not upgrade to the new Freenet

Please take action by selecting at least one option below:

Link…..

Thank you for being a valued customer.

The Freenet team