Passwords acceptability needs a universal standard.

I just tried to sign up to AirBNB using my email a@mydomain.com and got presented with a very unique error.“You cannot use your email in your password”Because the prefix of my email was a single letter, the system effectively banned me from using the letter ‘A’ anywhere in my password. I was forced to bypass my password manager and manually craft a custom string just to satisfy this ridiculous rule. I already know that the next time I try to log in, I will inevitably be clicking the “Forgot Password” button.Many sites nowadays ask for “Password must be at least 8 characters, contain one uppercase letter, one lowercase letter, one number, and one special character (!@#$%^&).”*Annoyed with this I always add exclamation mark at the end with the number 1 because both these keys are the same on the keypad.Some websites will say “Password cannot contain your first name, last name, or email address.”Every website seems to have its own unique, arbitrary set of rules created as they see fit.…