Add alternative email address for recovery option

Question

I am running my account with stack-exchange login. For recovery and security account has one email id by using which I logged in.

Now, can I register second email id to same account as a secondary or alternative email id by which I will recover my account if required in feauture? (Though I can successfully login with my 1st-primary email id)

Then how to add secondary email id to my account? or It is not permitted.

Answer 1

You can add other OpenID logins. This relies on you having another account elsewhere but any of them will log you into SE globally.

I realise that isn't the same thing as what you're asking but has the same effect.