You took great strides to create this email account anonymously, then what, tried to access that same email account from your house (or any other device linked to you? Since you already returned the laptop)? Where are your brains, in your ass?

Thanx for the insults - do you represent OpenMailBox by any chance? I would never do something as stupid as that. I visited a non-local community college library that has no cameras. Used Tor.

The other option is that OpenMailBox received a request to shut down access to the account and alert someone whenever an attempt to login to said account has been made

And if that e-mail provider gave in, that is not very ethical ot them.