The difference between WWZSOCKI and me is that he still has access to his email, while I lost mine due to inactivity. According to GMX's terms, they delete accounts if they notice 6 months of inactivity.
There is a certain user who also lost their email address but once they tried to prove ownership of some addresses they had used back in the day, he managed to recover his account. In fact this happened no so long ago, so recovering the account is not impossible as you think.
All you need is to prove that you are still in control of the Bitcoin address used in the earlier years.