How to stop facebook emails

Not sure if this is posted I the correct thread but I hope someone can help me.
Sometime ago a friend was having problems with their Facebook account and added my email address to their Facebook account as a secondary email in case they got locked out.
Now quite sometime later that account got compromised and they stopped using it and opened a new Facebook account, I have spoken to the person I helped and they do not have the email address or the password anymore. But now I am getting post from the old account.
How can I stop it please

Please move if not in the right thread

Normally you just login and stop notifications if you know the username you can login a bit forgot password and they will send a code to your email so can login and turn it off

TairikuOkami said:

Unless FB support can help, create an email filter to block those emails based on the syntax or something.

Not able to find Facebook support

and dont know the login details so unable to log it and remove

I blocked these email on my phone but they still get through and it say this email is from a blocked number but it still gets through